We live about an hour and 45 mins from there. It's VERY commercial/touristy. Lots to do. There isn't a lot in the way of healthy eating, but that's coming from a vegan. ;)
You'll definitely want to check out Wonder Works.
I don't know anything about Shelia's, but most of the cabins over there are decent. I looked at the listing on vbro, looks cool!
There is a Mellow Mushroom in Pigeon Forge! We haven't been to that location, but it is our all-time favorite pizza place. Fantastic food!
Trying to think...there's an outlet mall down there as well.