If I'm not mistaken, the Townsend KOA has raised their prices even more this year. I doubt we'll be staying there again. There are several others close.
Townsend is the best area to stay if you are only going to see the Smokies. If you plan on going to Pigeon Forge or Gatlingburg often, then I'd choose somewhere else. We stayed at Clabough's on Wear Valley Road last August when we went to Dollywood. It's a nice campground just off the main road in Pigeon Forge. A trolley runs through there that will take you to Gatlinburg or areas in PF. We never used it, but know quite a few people that would rather use the trolleys instead of driving.