I just checked availability in the campgrounds that I have made reservations in: May 11 is full, June 15 is full, June 19 is full, June 21 is NOT full, June 24 is full, June 28 is full, July/13 is full one year in advance, August 7 is NOT full, August 8 is full one year in advance, August 14 is full, Sept 14 has a few back ins for small trailers. The campgrounds that we go to are a mix of State Parks, KOA's and private. I wouldn't want to set off without reservations for the kind of campgrounds that we camp in.