Are you planning on sailing point to point or pulling in each night?
Pulling in each night here's the route
Manasquan to Atlantic City
Atlantic City to Cape May
Out the back Door of Cape May and up the Delaware to anchor
north of the C&D canal...figure a 12 hour day! Leave on ebb tide so you only fight it in the broader bay (stay in shallower water!) and use the flood tide to get you up the narrow part of the Bay.
Finally...C&D to Philly on a flooding tide.
Sailing point to point I would say about 30-35 hours.