We stayed at Lookout Mountain/Chattanooga West KOA in Trenton, Georgia for one week in May and loved it. This is a very family oriented campground with pull through and back up sites. Most of the sites are in the shade.
The staff is very friendly and go out of their way to help. We had a problem with our propane and the owner spent a long time helping us until we found a tear in one of the hoses. Without his help, we would have had to take our rv into a service center and that would have ruined our trip.
This KOA is near the Chattanooga Aquarium (17 minutes), Lookout Mountain, and the Hang Gliding Center. We would highly recommend staying here.