Like any place where riding of any vehicle takes place, the experience of the driver should coincide with the difficulty of the terrain. More often than not, the driver overestimates their ability to deal with the terrain.
We used to ride Tellico all the time when it was open. Very dangerous trails on an ATV but that is what we liked. Only trail that I did not do was Rock Garden. To be honest, all of the trails we rode required a minimum of a six pack to get eh courage up. A lot of the trails we rode were roughly 2-300 feet down if you flipped. Not for the novice riders for sure. We say our share of them with some mangled up ATVs.