"When the DW and DD arise, they will have their choice of a Sunshower or a waterless shower/hair wash kit ..."

Don't forget the simple little bird-bath: a coffee-spoon of baking soda in a half-gallon of warm water. It cleans very well (esp body oil and odor), is neutral and easy on the skin, needs no rinsing (unless you've added too much soda), and can be applied with a washcloth or sponge.

Sue