I'll be there with wife (Michigan grad) and in-laws. We're staying at their camper in Ypsilanti on Friday night and probably going to the golf course or Pioneer to tailgate Saturday morning.
As far as things to do in AA, highly recommend going to Zingerman's if you have the time. Great deli. Arbor Brewing isn't bad for a local beer, also suggest heading to the Brown Jug for a drink (simply because of our game - it's not a terribly special place otherwise).
Having been to AA more than any B1G city other than Minneapolis, I can say it's a really good college town.