The only campground that I can think of is Raccoon Creek. It's a state park and they have some nice spots, they're about 45 min from Oakland. There are no campgrounds in or near Oakland that I know of. (As already stated that's in the city) I purchased my AS in Mckeesport (south of pgh) and towed it north to Erie, and it wasn't a fun trip through the area, the roads are narrow and the turns are sharp. Raccoon Creek is just off of 22-30 which connects to 60 in Robinson and that will take you to Pgh.
FYI The park closes for the season on the 10/16