Nice campground but too small
The park itself is among the best in the entire PA state park system, offering unparalleled opportunities for wildlife viewing, but unfortunately, the campground is altogether too small — only 35 sites wedged between Rte. 872 and State Park Road — for the crowds it pulls. The walk-in sites are just inside the campground entrance and site 17 abuts several private hunting cabins so expect road noise and light pollution at night. Tent pads are of rocky packed earth which makes staking and guying out your tent a bit of a challenge. A decent amount of forest canopy also creates a microclimate that retains/amplifies humidity after it's burned off in other, more open sections of the park.
All that said, this is still a perfectly nice, clean, well-maintained campground probably best visited off-season, mid-week, and (eventually) post-pandemic. You certainly don't have to travel far to get a glimpse of the wildlife: I had a close encounter with a massive bull elk just walking from my campsite to the restrooms at dawn!