We actually stayed in the Maryland State Park just up the road but took a bike ride through the National Park. As others have said it is rustic camping at its best. No hookups, vegetation was a bit overgrown (because its nature!) but the BUGS! In the 25 minutes we rode through the park, we were eaten alive by green heads and mosquitos. My wife and kids had sprayed themselves heavily with Deep Woods Off and it had no affect. I counted 25 mosquito bites on me. Also the bathrooms looked like port-a-potties. The State Park apparently sprays and keeps the vegetation in the camping area somewhat controlled. Also the State Park has bath houses. I think I only had 1 mosquito bite all week in the State Park. As others have said - it is beautiful in both parks, but to us the State Park is so much nicer considering bugs. I don't know how anyone could sit outside at night there.
Great campground with wooded sites, large lake with boating, fishing and swimming. Hiking and bike trails are excellent. Bathrooms are few and "rustic" but otherwise acceptable. The electric sites looked a bit crowded compared to some of the other sites. We stayed in site 132 and all sites along the outer loop were very large and in great shape. Definitely going back next year. All staff we encountered were very helpful and friendly.
We just got back and couldn't wait to re-book again in September and book a week next summer. The only detractors are very limited access to electrical sites and the bathhouses could use a good scrubbing but were still acceptable. $30 a night with a very short walk to a virtually private beach. Wild horses and deer roaming all over including right through your campsite - with the occasional large pile of horse droppings scattered about. Very friendly camp staff including a park policeman who only issued a warning to this very excited new arriver. Observe the speed limits! Beaches were clean, fishing was fine, bugs were not a problem at all despite numerous horror stories. The campground itself was basically sand, grass, shrubs and asphalt - certainly nothing fancy. The stars at night were amazing, the cool ocean breezes were heavenly. Might have to borrow a generator next year though because my 12 volt was spent after just a few days.
This was our third annual trip to Knoebels and we enjoy it even more each time. So much so we scheduled another trip in August. We prefer the "Canadian Provinces" section of the campground as those sites are generally larger but not as much tree canopy. The older sections seem a bit crowded but are nestled amongst the trees. With the amusement park and pay pool/slide area, this place is simply awesome. Not having water at each site is a nuisance - hence the "9" rating.
We stayed in one of the popup/tent campsites and had a beautiful site close to the pool, bath house, and camp store. While you could hear the road noise from Rt. 30, it wasn't a problem at all and the other campers were very respectful and quiet. Some of the popup/tent sites would be quite a challenge to get into if you had a larger popup. Bathrooms and showers were spotless and the office staff were exceptionally friendly and helpful. There was a larger lot for bigger units but it didn't have much shade. This is a great park to stay at while exploring the Lancaster area then coming back to a nice quiet, friendly camp site.