I am planning on meeting up with a friend in Harper's Ferry to attend the Flip Flop Festival April 27-28th, and then start our hike North on the AT. My friend is planning to hike on thru to Maine (jealous!), but I only have 3 weeks that I can commit to this adventure. That means I need to try to get a general idea of where on the trail I might be at the end of a 3 week period so that I can figure out where to set up some sort of transportation from my ending point back to Austin, TX. I am 58 and in good shape, but this is my first serious backpacking hike hauling all my gear. Any suggestions on how to go about estimating a stopping point?

Appreciate your advice...
Saranee