Pine Mountain is IN Pigeon Forge, but on the Gatlinburg side. You are about 5 miles from Gatlinburg. It is a nice, but newer campground and the vegetation is still on the small side, but a great campground, nonetheless. It has a pool, and individual shower rooms, but are heated/cooled. There is an indoor pool as well as a lazy river pool and large hot tub that is available for use. It is NOT on the main parkway, but is a block back and is behind a knoll so that you don't get all the noise from the parkway.
It is by far our favorite campground in the area. There are others such as Riverside that seem to be a favorite, but it is on the other end of Pigeon Forge and I thought it was way over-priced and small, small sites.
You have to remember that you are going to a large touristy area, so sites will be small and there will be lots of them in a small area. Pine Mtn just fits our needs more than the others.