Arrowwood Hills is located off Pontiac Trail just southwest of US-23/M-14. Take Exit 4 (Whitmore Lake Road/Barton Drive). Turn left on Barton Drive, drive approximately 0.7 miles. Turn left on Pontiac Trail. Go about 0.5 miles and turn right on Arrowwood Trails.
There are numerous hotels in Ann Arbor near the intersection of Plymouth and Green, as well as at Briarwood Mall. Microtel is the cheapest of the bunch, but Hampton also offers a shuttle to campus. To see rates and locations, click here.
If you are planning on flying, fly into DTW. There is a very reasonable shuttle service from DTW to Ann Arbor, check out rates and times at AirRide's website. Roundtrip is $22 for adults, and any accompanying children 17 and under ride for free. This service drops you off at the Central Campus Transit Center, which is within walking distance of the venue.