http://www.hotcampshowers.com/products51784.html
I kind of like the propane ones at the URL above.
They do need either a vehicle battery or self contained.
I know about the solar showers, but those you need to fill, the propane ones you put a hose in the creek for your water source, or you can fill up a bucket with water.
These may seem extreme to some for primitive camping, but if you are out somewhere for a week during 80+ degree weather, it would be nice to have a hot shower or two a day to stay clean.
Anyone have experience with these units or a similar one?
They also make the ones that go on your rig and use your heater hoses to heat the water, but I really do not want to tear up the rig to install it.