In this Instructable learn how to make a portable camping shower. What sets this apart from a regular shower is it's pressurized so no need for a gravity feed bag that you hang from a tree, make this shower truly portable.
I LOVE the design of this "shower deck". It keeps you off the ground and also holds shampoo bottles, etc. I would not put my toiletries in there though. That would be gross to store your tooth brush in something that was on a public shower floor!