We use the shower bag as well down at our camp. Problem is you have to be able to heat some water up, and mix it with some cold water to get it close to what temp you like!! Nothing like a shower after getting lathered up!!

Baby wipes or a bucket with water, soap, and washcloth.
-- B

The solar bag takes a little while to warm the water up, to speed this up we warm water on camp fire or grill and mix with cold water. Sportmans guide sells a couple complete kits for under $50. I usually bring a few gallons of water or a couple of 5 gallon buckets and fill them a nearby gas station or a fresh spring. Nothing like a ice cold shower that makes your teeth chatter or takes your breath away but its does make you feel fresh and wakes you up if you don't warm the water.