Only effects a small portion of the AT, but something to keep in mind! Not sure how the logistics work. But there you have it...
Having carry a bear canister is very common out West I'm afraid (more so in National Parks than USFS land). I believe they are required in the Daks, but I'll let someone else more knowledgeable about those mountains chime in.
Wonder if such places at The Whites will have these types of regs in the future?