Yeah.  We can do the same with the back of our old Transit Van.  Put up the tarp over back open doors. Put down a large shallow bowl to stand in to keep feet clean and give em a soak,  Use a 15 litre squat water container, fill with hottish water, put up high at back of camper and use shower hand thingy off the tap to have a nice warm shower in privacy.  Pretty good shower.  Also, we have a chemical toilet in the van which we bring out at night and put where the side sliding door opens but is closed for night, and then you have a solution if you don't want to wander off to the shower block in the freezing cold and dark to wee at night. Looooxury for a bargain price.