I have 24' 99 inch wide C and parking is rarely an issue. I park in the outskirts of the suburban lot and pull through two spots. In most cases even a 22' would need a little extra. It's no big deal. In small towns, I'll often park on street a block or two off the main drag.
One thing that really pays is to be willing to scout out parking and be willing to walk a bit. I've found this most necessary in busy beach towns. A few blocks back and the parking can be more favorable.
I have not attempted to park in downtown LA, SF or other very large urban centers.
