i have a portable ice fishing tent, 4x4 and six foot tall. i carry a metal bucket and a watering can, both items i have in my garage anyway.
fill the bucket with water and heat it on the campfire. then with bucket of hot water and watering can in hand i go to my "shower tent"
dip the can full of hot water,,presto instant shower. get wet. soap up, and dip again to rinse.
some day when i get the spare money,,,i will buy a zodiac propane
portable shower . but its not a priority as we usualy camp where theres facilities.