This map shows the downtown/campus area for AA.
Parking on central campus can be problematic. There is a visitor garage (for pay) on S. Forest/Church street, a block south of the East Hall. There is also on-street parking.
We have a Google doc where you can coordinate with other workshop participants to share rides to/from the airport and to share hotel rooms.
The closest airport is DTW, a major Delta hub.
Taxis and "towncars" wait at DTW. The fare is approximately $50 to $60.
The Air Ride bus runs between DTW and the Blake transit center in downtown Ann Arbor. Blake is about 1/2 mile from the suggested hotels and local bus service is available. Some of the Air Ride trips stop at "Central Campus Transit Center," known locally as CC Little, which is a few hundred meters from the Michigan League and close to other hotels.
Another transportation option is Metro Eddie's shuttle, which is less expensive than taxies but may carry other passengers.