A 35 ft TT is pretty big for some Pa State Parks. We have a 26ft TT and I don't see many sites that will accomodate yours at Locust Lake.And even if the site would fit,backing in could be an issue. We often camp at Locus Lake. They have a great paved trail around the lake and a nice swimming beach.Promised Land Pickeral Point has a loop with full hookups. I think you would have better luck finding a site there because there are fewer trees to hinder backing into a site.We don't like the campground at French Creek.Many sites have the picknick table and camp fire ring behind the camper instead of next to it. That set up often puts you closer to you neighbor than we prefer. The rest of the park is fine and if you like history,Hopewell Village, a national Park historic site is next door.