We stayed in sites 102 and 104 with 3 other families, and used a total of five 3-4 person tents. We had plenty of [level] room to spread out. Our sites backed up to hundreds of acres of uninhabited forest, while also being within short walking distance of the camp store and visitor center.
Sites were non-electric, and there were no receptacles to be found anywhere close, even at the conveniently located (and very clean) bathrooms. Bring Your Own Electricity, but please note the generator quiet hours. (Solar generators and power stations for the win.) Fire rings are very heavy cast iron with with very sturdy, adjustable-height cooking grates. They really put out some heat once you get the fire going, and are very easy to cook on.
They don't want you bringing in outside wood for obvious reasons, and they only sell compressed saw dust wood bricks at the camp store. They work well once you get the hang of them, don't smoke much at all, and keep you warm. However, at ~$7.50 for a case of 6 blocks, they can get expensive quickly if, like my family, you're the kind of campers that like a good fire.
Overall, park was clean, quiet, and each site has just enough space for you to ignore the people around you if that's what you're into. We love all of the cheesy tourist traps in Cave City, and love the centralized location between Nashville and Louisville--allows me to easily camp with close friends I have in both cities. Already planning on coming back regularly.