Detroit is the nearest metropolitan area and its International Detroit/Wayne County Metro Airport is conveniently located in shuttle/taxi-cab distance to Ann Arbor and to the conference hotel. The maps and transportation options to the hotel are available here.
Information about transportation arrangements from/to the airport is here.
The Maps and Directions to the Conference Venue, the Ford School, (and within Ann Arbor in general) are available here.
Ann Arbor Visitor and Convention Bureau web-site.