Campgrounds and Camping Reservations - ReserveAmerica
we use that one for florida state parks in particular, but they also handle some private campgrounds and a lot of other states. Unlike a lot of campground reservation sites you can reserve your exact site and there are pictures of the site. you can filter by length of your rig, but I've found that they list site length from usually 5' from the road back to the end of the pad/gravel. So for example if you are 67' but you have 8' of overhang between your back axle and the end of the trailer put in 54' because that can overhang the grass on the site, and park with the bumper right at the road if needed. MOST of the time it is not a hard limit like trees, but just the edge of the gravel. I normally double check on google earth when looking for a long campsite. We are at 60' if I don't want to unhook the tow rig.