The Maple Hills RV Campground was a great treat and surprise to us. It is located on US 127 where the longest yardsale in the country takes place. (By the way, the yardsale begins August 5.) The owners, Mark & Audry, are a young couple working hard. The campground was well kept. Sites were spacious with no need for leveling. They charge $25 for a full hook-up (that's $12.50 with {Passport America). The bath house has 4 separate shower rooms so no need to share your shower with other people. All in all, I recommend this campground for anyone traveling in north-central Tennessee. Check them out at:
http://www.maplehillrv.com/