We have camped at Charlotte motor speedway and they say that they have quite hours but we heard generators running all night. Not sure why it was excellent weather and ac wasn't needed
Last July we were at Eldora speedway, not nascar but an event that had thousands of campers. They also have quite hours that were not enforced. What we did was when we returned to our site at night we would fire up the geneator for about an hour and ran the ac. That was enough to keep the camper cool thru the night. Also had a 12 volt fan that we ran in the bedroom. Temp stayed very comfortable .