No I don't have Fodor's. I do have a Wash DC area hikers and parks guide though.(posted 8919 days ago)I have been using www.nps.org in combination with the NPS Passport to target parks. I figured these particular parks fell more in line with the IBA Parks thing.
I was suggesting riding through Philly and DC to the actual Park/Memorial, get stamped and or play like I am answering a question, just to see how long it actually takes.