Beautiful but popular
Unicoi SP is a popular resort type area right outside Helen. We stayed in Hickory Hollow primitive camp area. It wasn't bad, but the sites are really close and expensive, hence the rating.
Each site has a tent pad, lantern hook, picnic table, and fire pit. The tent area is about 15x15, room enough for two to three smaller tents. There are water spigots throughout, but we carried our own in.
There's no parking at the campsites, everything has to be carried in from the parking lot. This could range anywhere from a couple dozen feet to almost a quarter mile. Due to the denseness of the campsites, a lot of people stumble into the closer sites not realizing they're off the trail.
The area has plenty to do though, from hiking Anna Ruby Falls to ziplining over the lake or visiting Helen.
I prefer more solitude, so i probably won't go back, but it's worth it at least once.