Going to Ann Arbor as well.
Got two pairs of tickets in section 21 for decent price on ebay. about $90/ticket including shipping.
Nothing in the way of hotels available in Ann Arbor, so we are staying in Jackson, MI about 40 min West of Ann Arbor.
We have been up there before and the parking/tailgating areas to the south of the stadium at the High School and the golf course (just look google maps) are good and available without a parking pass.