We bought one of these to put inside the closet in the ex's mother's old decrepit trailer. We had to take over the trailer for her because she couldn't afford to park it anywhere and couldn't afford new tires.
Most campgrounds have dumping facilities.
I wanted to go tent camping, though. That big yellow trailer ruined the ambience of the forest and the trees. Eventually we bought a two room cabin tent, and put the port a potti in the 1st room with our luggage.
People are making outdoor bathrooms with a ring they put a shower curtain on and hang from tree branches for privacy. You can also buy fold up outhouses made of tent material. In an emergency situation a bucket toilet would be better than nothing
@Stereoguy If I had a camper van at the very least I would want a tiny bathroom with a toilet and a hand-held shower with a floor drain. Could use the “kitchen” sink to wash my hands. Sometimes you don’t want to go outside or find a bathroom especially at night.
