Wow, camping when temps are over the 90's isn't for me. Seldom camp anywhere there are no hookups or electricity but do have a pair of Honday 2000i gens if needed.
Have NEVER built a fire at a campground, don't see the point unless going to cook over an open fire...but that's my choice.
BTW - how did you like Mammoth Cave? Walking down the steps into the cave the cool air is noticeable and it's big in there isn't it?