How long will you've visiting? Those places you mentioned seem to be long term places. If it is only a few days you could park at the Walmart off of Blair Mill road. I have seen rvs there for over a week. That would be the closest and it is 24 hour We don't have any really close campgrounds. Could you park in their driveway? Pm me if you would like info on the area
Another option, but further away is Timberlane Campground in Clarksboro, NJ. It is right off I 295. It is about a 20 min drive (avoiding rush hour) into Philly. Getting to Hatboro will add some time. Lots of folks use this cg as a home base when visiting the Philly area.
'02 KOUNTRY STAR DP
2012 HONDA FIT "PUMPKINMOBILE"
GILLIGAN- 1ST MATE CAT - 3 HR TOUR
Last June we stayed at the Phil/West Chester KOA in Coatesville, Pa. As I recall they had a van that took campers into the Philly and surrounding countryside to visit historic sites. Campground is on a hilltop, very quiet, full hookups, nice amenities, not expensive. It is out in the countryside off the beaten path but we had no trouble getting there in our 30' C. There were several class A's present as well. It took about 20 minutes for the van driver to get us into the city and drop us off for site seeing.