I had a Truck camper, had no shower but had almost a two foot square area in front of the toilet. I made a galvanized pan about 6" deep as big as would fit with a drain on the side close to the bottom then made the track on the ceiling bigger for arm room. I added lead fishing weights to the bottom of the curtain to keep it inside the pan. Worked out well. I guess you could put it in the center of the floor, like the RoadTrek, and extend a flex hose to drain out the side door into a container when finished. You would have to find room for the pan when not in use but you could use it for storage bin when not in use.