There are many, many, many there.
We LOVE Pine Mountain RV Park. It is in Pigeon Forge at traffic light #6. Shuttle service runs pretty much in all the parks in PF and Gatlinburg. Pine Mtn has a pool, indoor pool, lazy river pool and large hot tub available for use. It has individual shower rooms with heat/cool. Nice clean campground.
FYI: None of them are moderately priced, but you get what you pay for in this extremely touristy area.