Our 2001 PW Excel TD had a shower and you just pulled a shower curtain around the walls, toilet, etc and got with it. The outside shower had more room and you didn't have to worry about getting things wet, but of course you needed to have some kind of curtain or whatever for privacy if you so desired. There was no tub, just take the carpet off the floor so it doesn't get wet. Several years ago there was a posting on the Class B forum about outside shower room using PVC pipe, shower curtain, and hooking up to the side of the unit. You will need to request a search for shower in Class B forum to see how it was made.