Blackrock Mountain State Park.
I posted a review of the campground here. It may have been before the big hack, so it would be gone if that was when I posted it.
It's a great state park! You have water and power hookups. The campsites are very nice, with picnic table, fire ring, and lantern post. Some of the sites even have rock fireplaces. The campground itself is up on the ridgeline, so you're very high. Over 3,000 feet, where it's a lot cooler than in the valley.
Many hiking opportunities. I did a lot of that when we were there. Also, there are lots of things to see nearby, including Talulah Gorge State Park. I didn't care as much for the campground at the Gorge. It's nice, but not as pretty as the one at Blackrock.