Campground was very clean, but also provides very close quarters. We stayed over a Saturday and Sunday night and at least half of the spots were taken each night. One group spot was claimed Saturday night, which unfortunately made for a somewhat loud experience. Sound travels very far in this environment, and we could hear every word our neighbors were saying at 7am. However, the pit toilet was kept very clean, as were the camping spots and trails. Easy walk into the campsites from the parking lot, making this more of a "car camping" than primitive camping experience. There is easy access to all of the trails in the park, which are open 24/7. We took advantage of the Full Super Moon and did the boardwalk trail through the swamp at night, an experience I would HIGHLY recommend to anyone!
Table Rock is one of the largest state parks in the state of SC and has a TON to offer in terms of hiking. We stayed in the primitive hike in tent only camp sites, not the "regular" campground. The hike in was relatively easy. Sites are VERY close together, so don't plan on much privacy. Tent pads and picnic tables are provided and were clean.
I've now camped at spots 3, 4, and 9. This is my favorite place to camp in the state. The spots are clean and well maintained. As you're in a state park, you have the added benefit of a fire ring and tent pad, but no picnic table. However, unlike other state park campgrounds, each spot is about a quart mile from the next, so you feel like you have the mountain to yourself. Awesome place!