John W. from Pittsburgh, PA on 12/17/2016 4:59:12 PM:
I highly recommend the Trail Book as well. Excellent resource, loaded with good information. Benefits the Trail as well. The waterproof map in the back of the book is worth its weight in gold. The other reason I would suggest bringing this (or something printed) is that there are many parts of the trail where you will not get cell service. Some of the Hiker/Biker sites for sure. I always feel it's best to carry something like that if some kind of emergency were to occur.