Renewals from State come by mail. Do you want them coming to the campground? We've found not all CG's even accept mail or pkgs.
Even though you can renew online in FL, the tag renewals and new DL have to go somewhere to stick on your tag.
That's why we opted for a med-size box. Small would have been less annual cost, but we used to get more mail. But we went from every 2 wks to once a month to save money. You could have mail forwarded annually or go pick it up yourself if you're in the area.