Sometimes we will camp at a campground that has hot showers. These can be either free or fee showers. Campgrounds in drought prone states like California, Utah, Nevada and Arizona will charge a dollar or two for a 3-5 minute shower. States with plenty of water like Oregon and Washington usually have free hot showers.
When we are boondock camping we usually bring along a pop-up shower tent. The particular tent we have is simple and does not have a floor, so I purchased a plastic water heater tank catch pan to use as a floor. I also built a small platform out of 2x2 redwood to stand on while bathing.
Our first few attempts at using a solar camp shower failed miserably because either the water would not heat up in time to take a hot shower or it cooled off too fast at night. The typical solar showers are also really heavy when filled up and nearly impossible to lift over your head to a branch or a hook on a car roof rack so you can take a shower. However, my camping girlfriend and I have come up with our own solution. We just heat up a small pot of water on the fire or the stove, grab a cup and take it into the shower tent. We then just dip the cup into the pot and dump the warm water over our heads. It feels fantastic and we have more control over how much water gets used, which is necessary when camping in a place with limited water.
Another solution (but not available in all areas) is to utilize local hot springs. We camp quite a bit in the Eastern Sierras which has hot springs dotted all around the area. We lounge around in a hot spring for an hour or so and then wash off with some soap and a bottle of water. Also, if you don't mind a cold bath in the middle of the summer, you can always jump into a lake or river to wash off, just be sure to use biodegradable soap and shampoo.
