Wondered if anyone else has considered this?
Definitely. Our old Dodge minivan was perfect. It was the shorter version, so also easy to park.
Our next car will only be one with a flat cargo area (so many rear seats in the newer cars do not fold flat), and long-enough. Unfortunately, not many have the length. Newer mini-vans are too large, too expensive, less gas mileage, and typically not rated as well.
Our camping is typically en route - not destination, so camping in a car is far easier than pitching a tent, with all the extras. We also do not do it enough to warrant an RV. Whatever vehicle will be our only vehicle.