We had a 32' Class C and never had a problem finding a site on the East Coast, public or private.
As others have said, get the one that better suits your needs, not the one that might fit better into certain campgrounds. I thought our 32' Class C was cramped, I couldn't imagine what a 24' would feel like.
-Michael
Michael Girardo
2017 Jayco Jayflight Bungalow 40BHQS Destination Trailer
2009 Jayco Greyhawk 31FS Class C Motorhome (previously owned)
2006 Rockwood Roo 233 Hybrid Travel Trailer (previously owned)
1995 Jayco Eagle 12KB pop-up (previously owned)