Just to muddy the issue a tad...
My buddy and I each have Class C's, 24' and 27'. We once stayed in the same site at Sharp Creek {just below the Mogollon Rim}, with permission from the hosts. I had a reservation for another site but his site was huge with a large pull through that enabled us to park the two C's at a 90 degree angle without even coming close to encroaching on the access road. We each paid a fee and by my moving into his site free'd up my old site for another camper.
Upon arrival we simple, politely asked and were accommodated and we had a great 3 day stay. This CG is in the Tonto national Forrest.
:C