The best camping season of the year is after Labor Day and before the first snow fall.
I'm currently at General Butler State Park in Kentucky, and I don't think there are more than 4 or 5 unoccupied campsites. In spite of it being almost full, it's pretty quiet here. Folks didn't go nuts leaving outside lights on last night, no blasting scare lights left on. A couple had their amber colored porch lights on, and that was about all.
Sunny, in the 70's right right now, and no wind. So far, this has been a great week-end!