I will still recommend Pine Mountain. They do not have a playground, but your boys are too old for that, anyway.
The campground is 1 block off the parkway, but is behind a knoll so you don't get all the traffic noise, but you are close if you want to go somewhere. The other campgrounds are either a mile or so off the parkway or right on it. (In PF, anyway.)
There are 3 pools, a large indoor, a small outdoor and a lazy river outdoor to choose from. The bath house has bathrooms with stalls, but has 6 or 7 individual shower rooms with heat/air.
From PM RV P, you are 2 blocks from the Dollywood turnoff or you can take the trolley which goes to most all the campgrounds. You are also 4 blocks (there are 10 lights in PF) from the road to Gatlinburg, either the bypass to go up in the mountains or the main road into the town. Just before you get into town, you can stop at the trolley station and ride the trolley in/out so you don't have to park in town.
It is close to lots of restaurants - walking distance, even. But there is really no place to walk or jog other than inside the park or behind the fire department or police department (just up the hill).
Anyway, it's a great place and the sites along the creek are shaded. The pull-thrus are NOT. The vegetation has not grown up enough yet to provide much shade.
2017 Ford F350 Crew Cab 6.7L 4x4 DRW