These days it's pretty hard to find a bathroomless RV. It would be nice to find one with just the space for one. You could get a composting toilet. It's hard for the ladies to have to put on a robe and shoes and head for the campground bathhouse in the dark. If I have a bathroom 5 steps away I sleep all night, but camping I'm up and away to the bathhouses 3-4 times. Why is that I wonder?

We've always used tents. No chance of a bathroom there unless there's some new thing I haven't been told about.
DH and I bought two campers before we gave up. We looked a LOT. You have a spot to park yours and probably a diesel pickup that's up to pulling one. We have gasoline, 2500 Chevy--nice enough, but not really up to the job. Most of the ones we looked at had leaks that "could be easily fixed." That's from parking them outside, I'm told. Could also be from the unavoidable stress of simply driving down the road. We both loved the idea of being able to park in some isolated primitive campground.
In the end after re-selling one very nice, well maintained pull-behind because we didn't want to buy a new truck (poor planning) and another truckbed one because it had tie-down issues (gullibility and an adz-hole seller)--our lucky buyer was okay with repairing it (sigh), we decided hotels were cheaper, more comfortable, and getting up early to drive out and enjoy the sunrise had a lot going for it.
However lots of folks do have those fancy home-on-your-back rigs and love them. Just be sure you're sure before shelling out that hard-gotten cash.