I’ve walked several parts of it, and once dreamed of doing the whole thing. I did a lot of reading on it at the time (this was maybe 15 years ago or so), and found that there’s a wealth of information out there about timing, gear, repairs, mail drops, all kinds of stuff. Some folks who complete the AT go on to write books about it – seek out some of those; there are blogs out there now as well. I hope you get to do it, it’s an incredible journey.