I stayed here for two nights in the middle of the week in July 2020.  AFAIK all of the campsites here are first-come, first serve, so get here early.  I arrived at about 1:00 pm on a Tuesday, and got the last (worst) site, right next to the campground manager, the entrance, and the toilet.  

Most of the sites here are very close together and provide very little privacy, so when every site is occupied it felt more like a trailer park than a campground.  Between generators running, lots of kids running around, parties in the cabins next door, etc., the site was far louder than my home in the center of DC.  

On the plus side, the campground is right on the AT, so hiking is easy.  I won't be back in the high season, but might go back in the off-season (April, May, Sept, Oct).  This campground closes at the end of October.