Be careful when looking for a CG in this area. A lot of land owners took advantage of the increase in migrant workers due to fracking wells. I said fracking, honest, not a swear word. Throw in some water and electric, buy a honey wagon for the tractor. Ta-da....campground!!!!
Sounds like Mountain top may be one of THOSE.
Pine Cove is also NEW, however, judging by their website, may be a more respectful place. Albeit rather far from PGH.
That of course is the problem. Pittsburgh has no CLOSE campgrounds. Several State parks worth a stay, but not really close. Guess it depends on how long the OP is staying, how close they want to be, and what type of amenities is expected. Lots of nice places to stay about a hour outside the city. Mountains, lakes, creeks, etc... just not many real close.
EDIT: I just noticed that you said you are not worrying about being real close. Do you have a preferenc? ....Mountains to the east, several large State Parks on lakes and near streams. Several private CG's. Amish country north and west. Shopping? Casino?