The road in turns to dirt and becomes farely rough, but 4wd is not required. The spaces are along the dirt road but most are far enough back to not even notice the road as on the other side of the sites is a beautiful large creek. You can hear the creek all night as you sleep, there were deep enough spots to swim on the creek and shallow enough places to cross and explore. The sites are very spread out and private. We saw several people on our way in but our site was still several sites away from the next person and there were tons of sites available even in the summer. Highland lakes is at the very end of the road but it is a long drive on the rough road, it is beautiful and even more remote.  But we preferred to explore the creek and stay in a spot that was super private and had a great place to sit right on the creek. I would go back.