We have a 31' class c and unless we're doing a short "out and back" trip we always take the Harley's or the car. only took one long (2 month) trip to show we needed to have something. Renting a car was OK but occasionally it was a major inconvenience 1. no rental agency, or 2. We had to unhook and drive 20-30 miles to pick up the car. Once we had to get it in the rain and hated it!! Pretty much depends on what you are out to do.
Dave