Bill,

We went through there last December and skirted the Allegany State Forest (spelling is correct) on the NY side which connects to the Allegheny National Forest on PA side. After living in PA for about 18 years way back when (down near Philly) I would say that part of the state (northwest) would be the most enticing to me. There are some other great mountainous river systems near Williamstown but I don't know how navigable. Whitewater can be had down by Pittsburgh towards the Ohio...but then...that's whitewater :) Check out   (You need to Login or Register...they are out of Warren. Might be a place to start for planning...let me know what you find out too!