We arrived at about dinnertime to a park that was 99% full--and we had no reservation. We got the next-to-last slip--and people aborted entering the last one because it was too short. Our good luck.
Fine. We had been on the road for eight hours; although I have driven for longer than that, I didn't like it better. We were glad to stop for the evening in a pretty little park.
Mark_
R/V _Serenity_, Green River State Park, UT