Waterproofing Camping and Boating Gear

Waterproof camping and boating gear seems like kind of a no-brainer.  Shouldn't ALL camping, and especially boating gear be waterproof?  Maybe it should, but not everything you buy is waterproof -- or even water resistant.  But that is an oversight you can usually correct.

We usually don't set out to participate in outdoor recreational activities in bad weather, but is all too common for some to strike while we are enjoying the great outdoors.  When that happens, it is good to have waterproof or at least water resistant gear.

A lot, but not all, of camping and boating gear and apparel will come from the factory waterproofed.  Some fabrics are naturally waterproof or at least water resistant.  For those items that do not include factory waterproofing or for items that may have lost some of their waterproof capabilities due to normal wear and tear or abuse, you can often solve the problem with a product like Camp Dry spray.  It is not too expensive and is very easy to use.  Just spray a coat or two on clean dry items like tents, jackets, gloves, and footware.  It is said to work well on tents, tarps, boots, hunting apparel, outdoor gear, boat covers, and more.  I have used it for years to waterproof my OHV, cowboy boots, hiking boots, and to improve the waterproofing on coats, tents and awnings.  I figure it will be good to use on the main sail cover on my sailboat.  I have even heard of people using it on canvas shoes, which could be a real boon to boaters.  Be sure to test it on an inconspicuous spot on light colored materials to avoid permanent stains.

The first step in waterproofing your camping or boating gear is to make sure the item is clean and dry.  Be sure to brush debris and caked on dirt from the seams of boots and shoes.  Remove any stains you can.  You will want to set up your tent and make sure it is pulled tight when spraying your tent to ensure complete and even coverage.   You may also want to waterproof your packs.  Pay special attention to seams on all items:  tents, awnings, gloves, boots, shoes, and jackets.  Those are often the most likely points of leakage and need the most protection.

Camp Dry normally dries in abut 24 hours and cures completely in about 72 hours so you want to allow some time after applying it before using the items and subjecting them to precipitation.    Some forms of waterproofing can seal surfaces too well, causing them to trap moisture inside as well as keeping it out.   Camp Dry says it has no effect on the breatheability of fabrics when applied per the manufacturers instructions.  Attempting to waterproof items with other kinds of sealant may destroy breatheability and make them uncomfortable to wear.  Non-approved chemicals may cause damage to many materials.  If possible, test any protective product someplace it won't normally be seen to be sure it is safe to use on the full item.

Items protected with this kind of waterproofing will not stand up to being submerged for any length of time but normally does a good job of protecting them from normal dew, rain, and snow.  Camp Dry can even help protect parkas and other snow gear against melting snow.  I've seen way too many snow-rated garments that let melting snow in so as soon as you step in out of the cold and the snow melts you start to get soaked!  Camp Dry and similar products are designed to waterproof fabrics and footwear and are not designed to waterproof equipment.  You can use it to waterproof a canvas or heavy fabric bag to protect your cell phones or radios but don't use it on the devices themselves.  If you are looking for something that protects even when submerged, remember you will also need some way to seal the items where they contact your body.  Waterproof boots can still get wet inside when submerged because water can soak down between your leg and the boot.  Waterproof gloves may allow water to enter through the cuff when submerged.  I have seen people use duct tape to seal boots and gloves but it can be painful to remove when it gets stuck to your skin.

I have not had any problems nor heard of any problems with Camp Dry staining or otherwise altering the color of anything I've used it on, but, as always, try to test it on an inconspicuous area before applying to the entire item just to be sure.    I have used it on canvas, nylon, leather, and even suede, on jackets, gloves, shoes, and boots,  Even on my OHV riding pants!  I haven't tried it on riding jerseys.  I suspect the open weave that provides adequate breathability wouldn't be easily sealed against rain and I usually rely on a light jacket or poncho for upper body rain protection on the trail.

Applying waterproofing to boots or gloves is NOT a substitute for waterproof boots and gloves.   Applying waterproofing can help prevent water from easily penetrating materials but it is no substitute for truly waterproof  construction, like rubber boots or rubber gloves.

Another option is to put your stuff in dry bags.  Dry bags are often used on boats and can provide excellent water protection for gear in camp.  Dry bags are especially useful for things you normally wouldn't apply waterproofing to, such as clothing, socks, and underwear.  If you don't have any dry bags you can get some protection by putting your stuff in plastic trash bags and closing them tightly.  Of course that only works well for things you have in storage, not things you are wearing or actively using.

Stay dry!

 

RVing, OHVing, Camping, and Boating Weather

Weather can play a significant role in whether our outdoor recreational outings are successful and enjoyable or an utter and complete failure.  The old adage about raining on someone's picnic has definite roots in historical reality.  I am sure most of us have had at least one picnic, BBQ, or camping trip spoiled or at least dampened by rain.  

Perfect weather for outdoor activities is not something you can easily define.  What is perfect for one activity or one group may not be perfect for another activity or group.  For example, most of us would prefer to have fairly calm days for our outdoor activities or maybe just a mild breeze to help keep us cooler and more comfortable.  But is you are going sailing, you will need more wind to move your sailcraft.  Most camping and off-roading is done in summer months and avoids snow and other cold, wet weather.  But, if you are going snowmobiling, ice fishing, or cross country skiing, you absolutely need cold, snowy weather.  Most off-road riding is done in clear, dry weather, but riding after a light rain helps reduce dust and increase traction.  Sometimes getting a light rain out on the trail can be refreshing -- as long as there isn't enough to get you soaked and you can dry out before getting hypothermia, which can be life threatening if not caught and treated soon enough.

Most of us would prefer to go RVing, OHVing, Camping, or Boating when the weather is good.  So what does good weather look like?  Well, in most cases you want clear skies and warm (not too hot) days (probably in the low70s F), with no precipitation.  However, if you are going snowmobiling or ice fishing, the ideal weather could be quite different!  If you are into sailing you need wind, something most of us would rather avoid for outdoor recreation.  We once encountered winds so strong on a dirt biking trip in the Mojave Desert that they literally blew bikes and riders over when they reached the top of a hill and got caught in a crosswind.  Definitely NOT ideal OHV riding conditions!  We usually avoided riding in rain or snow or even really hot weather.  A pretty good target for good outdoor recreation weather would be a clear, calm, day with temperatures in the low 70s F.  Lower temperatures will require you to dress warmer; hotter temps will demand cooling techniques.   Sailors will want to look for steady winds somewhere around 10-12 knots.  Lower winds don't provide enough energy to move boats comfortably;  higher winds can create dangerous situations out on the water.

Human beings are most comfortable in an environment around 70F - 72F.  However we are also quite adaptable.  We can usually dress up or down to accommodate slight variation in that temperature and still be relatively comfortable.  That being said, almost of us will plan and enjoy outdoor activities when we stick to reasonable weather ranges.  You probably don't need to make a lot of changes in your planned activities or your basic wardrobe as long as outside temperatures are in the 60-80F range.  Temperatures below 60F will require dressing warmer and when it gets above 80F you are going to want better ways of keeping cool, and may be forced to limit your activities to avoid hyperthermia (heat illness).  Swimming and other on-the-water activities are attractive pastimes for hot days and can help keep you cool.

The best weather may differ depending on what activities you are planning.  Normal camping where you mostly sit around and enjoy the scenery and ambiance is most comfortable in mild temperatures around 72F.  Water sports can be enjoyed during hotter weather.  OHV riding is usually adaptable to a wider range of temperatures, with cooler days being more comfortable than warmer ones.  Hiking or any other highly physical activity will thrive in cooler temperatures and become tedious and unpleasant as things warm up.  Light rain may or may not be an issue, depending on available canopies, enclosed vehicles, and good rain gear.  Heavy rain is almost always a deterrent to outdoor recreation.  Windy days can spoil your picnics and campfires and I've even seen winds strong enough to blow over dirt bikers when they topped a hill.  However, a certain amount of wind is good and even necessary if you are going sailing and light breezes are usually beneficial in camp and for camp fires.  A light breeze is welcome on warmer days.  Cloudy days can moderate temperatures but you may still be subjected to UV rays that can cause a sunburn and cloudy days can inhibit good lighting for photography.  If you are doing any winter activities (skiing, snowboarding, snowmobiling, ice skating, ice fishing, etc) you will need near or below freezing temperatures and snowy conditions.

Keep in mind the weather when you arrive at your destination could be very different that the weather around your house when you leave home.  We often deliberately drive several hours to a different climate so be sure to check the weather at your destination before you leave home.   Mountain campgrounds are a frequent choice of campers.  Be aware that many large mountains can create their own localized weather that might not show up in a regional forecast, so check with someone who knows the area before you go.  That might include rangers, law enforcement, merchants, and fellow campers who have been there before.  I once worked a summer job at a mountain resort and we got rain at about 1:00 almost every day, regardless of what was in the regional forecast.  You could almost set your watch by it!

There are several good resources available to you to predict and monitor the weather.  These days most of us rely heavily on electronic devices to provide us with information.  Internet weather service usually provide a good idea of what is going to happen.  NOAA radios give you regular updates just about where ever you might be.  You can get local AM and FM radio stations on your car or portable radios.  Another good source for local weather information is the sky.  Unfortunately, a lot of us mostly city-dwellers have never learned how to read the sky for clues about the weather but you can learn basics from the how to read the sky link.  There are also handy guides to wind strength you can use to judge velocity based on what you can see around you.  Here is a link to chart for Estimating Wind Speeds With Visual Clues. You can also purchase portable weather stations you can use just about anywhere to monitor temperature, humidity, barometric pressure, wind speed, and even precipitation.  Some aids don't require electronics.  Even airplane pilots still use wind socks to monitor wind direction and strength and a small one hanging in your camp and do the same for you.

One of my favorite weather station stories is about the weather string or rope, a very simple device but it is surprisingly accurate. If you can see it, the sun (or moon) is shining.  If you can't see it, it is either dark outside or a strong wind blew it away.  If it is moving it is windy--and you can actually get a good idea how hard the wind is blowing and which direction.  If it is wet it is raining.  If is it blurry there is fog.  If it is frozen it is cold outside.  Tried to link the image below to the etsy.com page where you could buy one, but it didn't work.  If you want one do an online search for "redneck weather rope" and you should get several affordable options.  Or, if you are crafty, make your own!

 

                                            

Sometimes you may want to alter your plans if the weather is not suitable.  Having a comfortable RV or tent where you can escape unpleasant weather is nice.  If the weather gets too bad for your accommodations you might need to head home or seek better shelter.  Other times you may only need to adjust your wardrobe.  In any case, it always behooves you to check the weather where you are going before you get there!

Happy forecasting!

Keeping Cool When RVing, OHVing, Camping, and Boating

Keeping cool during our outdoor activities can sometimes be more difficult than staying warm.  After all, there is only so much clothing you can remove to cool down and you can almost always add more layers to stay warm!  Of course, having some cool place, like an air conditioned RV, vehicle, boat or cabin or even a shady awning or canopy or tree will provide wonderful respite from the heat.  But many times we will be involved in outdoor activities on hot days and need to know hot to stay as cool as possible during those times.

If you do have an air conditioned RV or boat you will want to make sure the air conditioner is properly maintained and operating efficiently before you head out.  I like to begin cooling my rig early in the day rather than wait until it uncomfortably warm inside.  I believe it is less stress on the air conditioner and the generator and I KNOW it is more comfortable for me and my family!

Dressing for the weather is the primary key to staying cool during outdoor activities.  Loose fitting, light weight clothing that allows adequate ventilation for perspiration to evaporate is usually the best choice for staying cool.  Think about how desert nomads dress:  loose, flowing robes that essentially provide portable shade for them wherever they go.  Light colors will stay cooler in sunlight than dark colors.  Those pastels may not be the most macho looking, but they are going to be a lot cooler.  While T-shirts and tank tops are popular choices for summer wear, loose fitting long sleeved shirts may actually keep you cooler along with protecting you from sunburn.

A good broad-brimmed hat is a good option for protecting your head and face.  For hot days I like a straw hat that I can soak with water for even better cooling.

A bandanna around your neck will help protect against sunburn and when soaked with water will help cool you more than you might expect.  For one thing, there are large blood vessels in your neck that can be cooled by the wet bandanna, thereby helping cool your brain and even other parts of  your body.

When boating you can, of course, wear swimwear which allows you to plunge into the water when you need to cool off.  However, exercise caution and use plenty of sunblock when sitting around in swimwear because you will be exposing a lot more tender flesh to the sun than you normally do.

Anytime you are near the water you may be able to go into the water to cool down.   There are a few exceptions.  You aren't going to cool down going into hot springs but you might cool down once you come out, especially if there is a breeze.  Never enter contaminated water or go into water where human contact is prohibited.  Exercise caution where ever there are other people in the water.  You never know what kind of pollution they might be introducing.

Evaporation is one of the best ways to cool down.  Our bodies are even designed to use evaporation to help regulate body temperature.  That is why we sweat.  Dressing in clothing that facilitates enough ventilation to allow evaporation is one way to help our bodies take care of themselves.  When that isn't enough we can sometimes wet at least some parts of our clothing and/or skin to increase evaporation and aid cooling.  We can also spritz parts of our exposed skin with water.  The application of cool mist is refreshing and it will help cool us down as it evaporates.  My family and I keep spray bottles with clean water in our RV and boat (and near the patio at home) just for that purpose.   

Options for keeping cool when operating an OHV are somewhat limited.  Unless you have an enclosed side-by-side with A/C (very rare!) about your only option it to keep moving so the apparent breeze carries away unwanted heat.  You can start by dressing as lightly as possible.  Avoid wearing thick underwear that will trap heat.  Dress in light colors to minimize solar heating.  Avoid riding during the hotter parts of the day.  When riding in the Mojave Desert in summer we usually did two rides a day:  one in the early morning and then another one in later afternoon/early evening.  On occasion the evening rides ended up in us not getting back to camp until well after dark.  It was a real challenge leading 18 or so dirt bike through the desert with only 1 or 2 having headlights!  You will want to avoid staying out on the trails after dark unless you are properly prepared for night rides!

Keep your cool!

Keeping Warm When RVing, OHVing, Camping, and Boating

One way to keep warm when RVing, Camping, and Boating is to keep your vehicle, tent or vessel warm so you have a convenient place to escape the cold.  However, when OHVing or when you are outside of your temporary abode, you will need to dress according to the weather in order to keep YOU warm enough to be comfortable.

If you have a heated shelter take advantage of it!  Most RVs and Campers and some boat cabins include furnaces or heaters to maintain comfortable temperatures.  If you are doing any outings during cold weather, be sure your furnace or heater is working properly and that you have sufficient fuel.  If the heating unit in your rig isn't adequate to keep the interior as warm as you would like, look into upgrading the heating unit or adding another one.  Portable propane powered catalytic heaters can be used in most RVs, campers, boats, and even tents.  Although they don't produce toxic fumes they do consume oxygen so you MUST provide adequate ventilation to prevent suffocation when using one.  Electric heaters don't have that problem -- if you have 120 volt power to run them!  See my posts on Keeping Your RV or Camper Warm  and Keeping Your Tent Warm for more information.  Even getting in out of the wind and/or other unfavorable weather can help.  I've heard it said that even having a canopy overhead can raise the temperature beneath it by 20F in cold weather.

When outside the best approach is to dress in layers.  Multiple layers not only provide extra insulation to help keep you warm, they allow you to remove outer layers as necessary when things warm up, either due to high activity or warmer air temperatures.

Base layers usually consist of thermal underwear, sometimes known as "long johns".  They should fit snuggly but not restrict movement.  Traditional thermal underwear is often made of wool, which retains its insulating quality even when wet.  Modern innovations include a number of natural and synthetic blends designed to keep you warm and wick away perspiration.  You may have try some different materials before you find the one that is right for you.

Your next layer will usually be the clothing you normally wear for the activities you will be doing.   On cooler days you might want to wear a warmer flannel or velour long sleeved shirt instead of the light weight short sleeved shirts you probably prefer for most outdoor activities.

Depending on how cold it is, you may want to add a sweater or sweatshirt before donning a jacket or coat.  How heavy a jacket or coat you choose will depend on the outside temperature and the level of  physical activity you expect to be performing.  The colder the outside temperature and the less active you plan to be, the warmer your coat will need to be.

Keeping your hands, feet, and head warm is always a priority.  You will need appropriate warm gloves or mittens to protect your hands.  Mittens are warmer than gloves but you lose some dexterity.  Proper socks and insulated boots will help keep your feet warm.  You can add chemical hand and foot warmers for even more warmth.  If your coat does not have a warm hood you will need to wear a warm hat.  My favorite cold weather hat is a Russian ushanka or "ear hat".  They have flaps that cover your ears and part of your cheeks and are usually made of fur.  In really cold weather, or when riding OHVs in cold weather, you may need a face mask.

When riding an OHV you may want to substitute a Windchill jersey for your normal shirt.  Windchill jereys are designed to provide extra protection against wind and cold air without interfering with movement needed to safely and comfortably operate your off highway vehicle.  In really cold riding weather you may need to add an Enduro jacket.  These are usually made of Gore-Tex to be light weight yet sturdy and are very good at blocking the wind.  They may or may not have linings for additional warmth.  Having one with a removable liner gives you more options.

Anytime you have to deal with rain you will need rain gear.  Even those nice, warm ski parkas are likely to get wet in the rain.  A simple plastic poncho is an easy and inexpensive way to protect your upper body from rain.  They are small enough when folded to fit in a pack or pocket so you can have them ready for unexpected precipitation on the trail.  Rain suits provide even better protection for OHV riders, hikers, and just around camp.  Equestrian riders may want to invest in a slicker, a rain coat long enough to cover your legs while sitting in the saddle.

If you plan and dress appropriately you should be able to stay comfortable in even the coldest weather.  Consider mountain climbers, arctic explorers ad Eskimos who brave extreme weather conditions with high winds and temperatures far below freezing, sometimes for long periods of time.

Always try to have a backup warm up plan -- a warm tent or RV to go to or ate least  place to get in out of the wind and weather.   You can manage quite a lot of cold weather if you can take a break to warm up from time to time.  Maybe just getting in your vehicle and running the heater for a while if you have no other options.  Warm food and drinks are always welcome when you are cold and can actually help return your body temperature to normal.

Stay warm! 

Keeping Your Tent Cool

Let's face it.  The temperature inside tents is difficult to control.  Tent walls are only a fraction of an inch thick, and while they do protect us from wind and rain and snow and sun, they do not do a good job of insulating the interior against changes in the outside temperature. 

The first trick to keeping your tent cool is where you set it up.  Try to set it up in a shady location near a grassy area, stream or body of water.  Doing so will help keep the air around your tent cooler and therefore the air inside your tent cooler.  Take advantage of any shade you can:  trees, awnings and canopies, even the shadow of an RV if you are camped near one.  Try to align windows and doors to take advantage of prevailing breezes.

Provide adequate ventilation.  Trapped, stale area is more likely to capture heat and warm up than moving air.  Moving air will also help you fell cooler and more comfortable.  Open windows on opposite sides of the tent to encourage air flow and make sure one of them is exposed to the prevailing breeze whenever that is possible.  

If you have a rain fly, use it!  Rain flys shade the tent itself and usually provide at least an inch or so air gap between the tent wall and the fly, which helps reduce the transfer of heat into the interior.  You might try shading your tent with a tarp, but without proper spacing it will likely touch the tent fabric in many places it can heat the interior via conduction of heat through the tarp to the tent fabric in into the tent.  Actually, putting a canopy, such as a dining fly over it will  probably work better than draping a tarp over it.  A tarp lying on the tent fabric will allow heat to be conducted between the two fabrics while having the tent in the shade of a canopy will protect the tent from both radiant heat from the sun and conduction from the tarp to the tent fabric.

I have seen people attempt to cool tents by spraying the window screens with water to act like an evaporative cooler.   Or even spraying the tent itself.  That might help a little in dry climates but even the best evaporative coolers don't work well in when the humidity is above 50% and work best below 25%.  Many popular campgrounds are near lakes or streams where the average humidity is often higher.  The small amount of water the thin screen can hold and the limited surface area doesn't allow for very much cooling.   The pads on evaporative coolers are typically an inch or so thick.  You will probably feel cooler spraying the water on your body.  Cooling the tent fabric might help a little, but if it is exposed to direct sunlight it is still going to get hot inside.

One way to feel cooler in your tent is to dress cooler.  Thin, light weight clothing will allow your own body heat to escape more easily, helping you feel cooler.  You can even safely wear T-shirts and shorts or swimwear since you won't be out in the sunlight risking sunburn and UV exposure.

Sometimes you will feel cooler outside your tent than inside.  As the sun warms the tent fabric, the air inside warms up too.  There will almost always be more breeze outside your tent than inside.  Even with the windows open the tent will restrict air flow to some extent, so going outside will usually let you feel cooler and more comfortable.   Find a nice shady spot to cool off in!

Keep cool if you can!

Keeping Your Boat Cool

Some of the tips for keeping an RV cool can be used for keeping your boat cool.  However, boats are different than RVs and have some special considerations.

Finding shade out on the water is usually not an option if you want to ''park'' your boat to cool off.  You might sometimes luck out and find a moorage or anchorage under some trees, but finding an appropriate spot for sailboats with their tall masts will be almost impossible. You will have to bring your own shade with you in the form of tarps or canopies to shield you and parts of your boat from direct sunlight.  You also have to deal with sunlight reflected off the water.

Take advantage of natural breezes when you can.   When we are out boating, most of the time the boat is moving, which creates some artificial breeze even on the calmest of days.  Open hatches and portholes where ever possible to allow as much air flow as you can.  You can also get windscoops that fit over hatches to catch the breeze and funnel it down into the cabin.  Remember that air needs someplace to go so always open a hatch or porthole opposite the one used to catch the breeze.  Otherwise the air flow will be blocked and you won't get any cooling!

Since boats sit in the water and the water is usually a lot cooler than the air, the hull will absorb some of the heat from the cabin.  Having removable insulation, such as foam pads, can allow you to disperse unwanted heat by removing the pads when you need to when things cool down.  You might also splash water up over parts of the deck to help cool down the decking both for greater comfort walking on it barefoot and to remove a little heat from the cabin.

I have successfully used mist systems to cool the patio area under the awning of my RV.   Mist systems might also be used on boats and, since boats sit in the water, you wouldn't need a water tank to supply water for the mist.  What you will need is power for the pump.  If you have sufficient solar panels and/or batteries it could work very well.  You may have already enjoyed mist systems in the long lines at amusement parks.  Mist cools by evaporation and high humidity around large bodies of water might reduce its efficiency, but it still might be worth a try.

I have heard of cooling mattress pads to make sleeping more comfortable but I have not had the opportunity to try them out yet.  Might be worth looking into if you often find it too hot to sleep.  Some circulate liquids to do the cooling.  Be sure you have adequate battery power to run the pump.

Larger yachts and cabin cruisers sometimes might have air conditioning you can use, but they are not practical on smaller boats.  Fans can be used on most boats to move air through the cabins.  Note:  fans do not cool the air.  They only move it so it can it can cool YOU better as it removes heat from your skin by convection and by evaporation of perspiration or water vapor on your skin.

Cruise cool!

Keeping Your RV or Camper Cool

Since a lot of our outdoor activities happen in warmer weather, keeping our temporary abodes cool is usually more of an issue than keeping them warm.  Some, but certainly not all RVs and camper are equipped with air conditioners but even they are not always enough to keep the units as cool as we might like the to be.  Boats have different heating and cooling problems than RVs.  Please see my post on Keeping Your Boat Cabin a Comfortable Temperature for more information on boats.

Many but certainly not all recreational vehicles have roof air conditioning to cool the interior in camp.   If you are lucky enough to have it and either have campground power or a generator to supply the necessary electricity, by all means, take advantage of it.  Nothing else is going to do nearly as good a job at keeping you cool when it gets hot outside.  If you don't have A/C be sure to check out the suggestions below.  Even if you have A/C you might find some of the  following tips useful to reduce the load on your A/C and generator and keep your more comfortable. 

First of all, try to take advantage of any natural shade and cooling where possible.  Park your unit under safe trees and near grassy areas or water where surface temperatures will be less.  Be sure any trees you park under don't contain loose or broken branches that might fall onto the roof of your rig.  When parking near water, avoid parking in depressions that might collect water if it rains or a flash flood raises the water level of the stream or body of water you are near.  Another trick is to park with the rear of the unit facing the sun most of the day.  Motorhomes have a huge windsheild and even travel trailers often have a large window in the front, both of which can allow a lot of sunlight in to heat the interior.   If you can't orient your unit that way in the available space, try to park with the side that has the smallest amount of glass facing the sun.  The goal is to keep as much of the windows out of the sun as possible to reduce the amount of heat they will admit.

Take advantage of cooler night air to cool down the interior of your rig.  Furnishings, appliances, even upholstery, flooring, and walls, will store heat and make it harder to cool your unit.  Open some window and vents when things cool down outside and use any fans you may have to bring in cool air and/or expel hot air.  Most RVs and campers have at least one 14" roof vent.  You might be surprised how much opening that vent along with  a window or two will allow hot air to escape.  Be sure to remember to open a window or two to allow cool air to enter as hot air escapes out of the vent.  Otherwise, without a place for fresh air to enter, the hot air exiting the vent will be restricted.

Fans don't cool the air but they do cool you.  And they can help move hot air out and cooler air in.  Powered roof vents will help cool your unit faster than unpowered vents.  Air moving over your skin will  draw away heat and evaporate perspiration, making you feel cooler, so fans, either powered or manual, are a good way to feel cooler.  Unpowered vents help expel heat.  Heat rises, so an open vent in the ceiling allows the hottest air to exit.  You will need to open a window a little bit so there is somewhere for cooler air to enter.

When doing a lot of summer camping in the Mojave Desert I added some misters to my awning.   They made the patio space under the awning quite comfortable on hot days and having a cooler space next to at least part of my RV even helped make it easier to keep it cooler inside.  I chose to add a separate water tank and water pump so I didn't deplete my culinary water or burn out my regular water pump running the misters.  Most mist systems you can buy are designed to connect to a garden hose.  You will probably need a way to connect a garden hose to whatever water supply you use or else you will have to plumb the mist systems directly into your RV plumbing.

Awnings will help reduce the amount of sunlight coming through the windows and heating up the interior of your rig.  Take advantage of patios awnings and any window awnings you might have.  Use reflective foam panels on the inside of windows to keep heat and light outside.  These panels can be used with or without awnings.  Also keep all your curtains, drapes, and blinds closed to minimize heat coming in through the windows.

Most RVs and campers come with fairly good wall, ceiling, and floor insulation, but in some cases you might be able to increase the insulation to make it easier to maintain the desired temperature inside.  I had a van camper that relied solely on the air gap between the metal exterior and the interior wall and ceiling paneling for insulation.  Unfortunately the air was still able to move enough to allow convection to transfer heat in and out of the living area.  Filling the gap with Stryofoam panels, fiberglass mats, and/or expanding foam significantly improved the insulation of the living space.

I have found it is usually better to begin cooling my RV early in the day rather than waiting for it to get too warm inside.  It seems to put less load on the A/C and generator and does a better job of keeping the interior comfortable when it gets really hot outside.

Avoid using the stove and oven.  Cook outside or use the microwave so you don't add a lot of unwanted heat to the interior or your rig.  If possible, limit the number of people inside your rig.  Each person adds about as much heat as a 100 watt bulb!

Keep cool!