Can you take the train to 30th street (Philly), then a cab? Heck, I think the Market-Frankfurt line gets you kind of close, so a cab from one of those stops might work, too. Overnight on the boat, sail it home the next day. Another option is a U-Haul. Rent the smallest truck they'll let you take one way. Still another option is to go with Enterprise or Budget. Both do one-way rentals, but they typically only do pick-up and drop-off at airports for those. Still worth looking into; Denise's club isn't THAT far from the airport.
Can you tell I went through similar preparations not that long ago?
Can you tell I think that if you're going to go down one of these paths, the Philly boat is the better path to go down?