For the record I would never rent or consider renting out my camper.
However there are those who do it via the Air BNB concept.
WE camp annually at a friends waterfront property. It's sort of a big back yard party.
Those of us with RV's set up in the back yard. We have outlets wired into the panel. There are also some that come by boat and others simply tent camp for the weekend.
One of my friends has been renting an RV for the event simply because his wife is not roughing it in a tent and he does not own an RV.
He rents from the same Air B N B style site.
He has rented a class A for $300? or so a night and a 30' bunk house TT for $200.00 or so a night. I do not know if the concept/transaction is profitable for the rental company and /or RV owner. I do know my buddy is happy and keeps renting RV's for the annual party.
I have not researched the idea or done any P&L calculations. However I do think RV renting can be a viable business in the right location.
I don't see it working so well in New England or somewhere with a short/limited camping season. But Carolinas, Georgia, or somewhere with an extended season located close to an attraction or popular camping destination has potential.