A lesser-known that may be less busy on game day is Sidetrack Bar & Grill which is in Ypsilanti, basically on the way from Canton to Ann Arbor.
Also check out Plymouth Orchards and Cider Mill for some fresh cider and excellent donuts. Great spot to hit in the morning before the game.
Make sure you take some time a couple hours before the game to check out the tailgating scene on the golf course.