We stayed at Mountain Lake Marina and CG for a while. The sites could be a bit bigger but most of the sites have new services installed. The CG is on the west side of the lake east of Rocky Top off of I-75. Norris is a pretty steep sided lake and this CG will tire you out walking back from the lake if you are near the office.
Randy
p.s. If you are there during football season you may get a visit from Lucy the dog. She feels ignored at home (she lives at a neighboring house) on Saturdays and comes over and visits the campers.