You don't have to camp if you stay overnight at Ohiopyle. There are other options for lodging. Ohiopyle is a fun place to stop and very scenic. It could be very busy with campers, rafters/kayakers and park visitors at times but there is a lot to do there. Many restaurants and pubs, a bike shop, park visitor's center, ice cream shops, etc. We stayed at Confluence a few miles down the trail but ate lunch and had long stops in Ohiopyle. In my opinion, it's one of the highlights of the GAP.