Alpharetta is your best bet, it's actually not far from Canton at all, and I believe still at Ale House on Mansell Rd off GA 400. Easy, maybe 20-25 min drive from Canton through back roads.
I live in Buford on the NE side, pretty much opposite of you. . You're closer to Alpharetta than I am, though. The watch parties are usually geared more towards Bulls alumni that live near or inside the Perimeter. Jus' the way it is, I'm afraid.
Do you attend the watch parties in Atlanta?