I checked out mapquest and it told me around 4½ hours to get to Shamokin...this is from Morgantown WV, not Harrisonburg VA, since I have plans on fri and sat nights. I'll let you know by this Sunday evening. It takes me about an hour and a half to get to Hagerstown MD.
If g/f doesn't go for it....it all, basically, depends if we're hung over on Sunday morning...and 6 am is not a good time to wake up in that situation....maybe we could set something up for another weekend past the middle of May. We have a TON of trails down here in Harrisonburg, I haven't even come close to going on all of them. I haven't even been out this year and I'm really (REALLY) itching to do it. I'll let you know.

Were do you live in So. Cen. PA? Harrisburg?