John from Pittsburgh, PA on 2/3/2015 10:31:59 PM:
I concur about Trailbook. I have the 2011-12 edition so I'll probably get the latest version this spring. The book is great but what clinches it for me is the vinyl waterproof map that comes with it. Very handy and can handle the all the wet, heat, folding, etc., you can throw at it. Also, to get a taste of the GAP/C&O before you depart, there are a couple of nice DVD's out there: "On the Passage" and "On the Canal" both by John Urman. I found them on the GAP site store online.