WETSU,
BGs are usually too lazy to venture very far off the beaten trail to cause someone trouble. That said, the A.T. passes through all types of areas. Regardless of the "chances" of running upon a 2 legged beast, which is more probable than meeting trouble w/4 legged critters, you have the God-given right to go armed, (albeit not the legal right). The risk is yours. BG vs. LEO. If you stay out of trouble, as I am assuming you will, and stay off of posted private property on the way, and don't camp in areas you're not sure if legal, chances seem slim that you w/be frisked and arrested.
I've been shot at while hiking and minding my own business in the least likely of places. Another time I've had BGs w/long guns looking for trouble at midnight far from main roads....stalking outside our camp perimeter. Had to let them know we were armed before they decided to leave us alone. I've come to the conclusion that some BGs do "whatever they want" w/out regard for life, or property, when they are in rural areas. Why? Because they know that they won't get caught. Seems as if some who are intent on doing someone harm has some alcohol or other drug in their system are liable to do anything. The only thing that these people seem to respond to is immediate equal consequences to their actions. I hate it when someone places the innocent in a possition in which they are in fear for their life. I also hate it when those who think they know better, legally deny the innocent the means to defend his life.
If you decide to go armed, one thing to keep in mind is that if you get into a situation where someone attacks you, you probably won't get much/any notice to prepare. Keep your side arm immediately accessable. In other words, it won't do much good in the bottom of your pack.
I like what Thomas Jefferson said. "Let your gun be the companion of your walks."
Have fun! I wish I had the opportunity to hike that trail.
robert
------------------
"But now, he that hath a purse, let him take it, and likewise his scrip; and he that hath no sword, let him sell his garment, and buy one." -Jesus Christ (Luke 22:36, see John 3:15-18)