Here is a list of P.O.s along the trail. It's the only comprehensive list that I could find, but may have been updated as long ago as 2002. The best thing to do is call them ahead of time to make certain it's still in existence. Also, try and send to the closest (those with no parentheses below the town, or within a few miles, i.e. not 18 mi. away like Dahlonega). E-mail me about 2 weeks before you plan on it arriving, and send it at least a week before you expect me to be there.