New Jersey did have a beautiful campground, but you did have to pay for electricity. Also, being from a gun friendly state, I may or may not have a firearm in my RV. If I do camping in New Jersey, I am breaking serious laws and could spend lots of time in their jail. So I avoid camping in non-gun friendly states . . . even if I don't have any firearms with me.
Campgrounds in Pennsylvania are so far out from Philly proper, an hour trip each way is the norm. One night, going home tired, we got lost and it took 3 hours . . .
Our kids live close to the river and it's easy to get on Washington Avenue from Campus Park and Ride and zip over to all activities. Just have to be aware of the double parkers along the route . . . especially around the Italian Market. (but a neat place to visit)
Oh, and it's just around the corner from Penn University ! !
One note, the farther you are away from the office area . . . the closer you are to the train tracks on the other side of the fence. Didn't hear very many trains though . . .