Flight
The most affordable local airports will be Chicago O'Hare/Midway or Detroit Metro. The closer and more convenient airports are the Gerald R. Ford Int'l Airport in Grand Rapids and the Kalamazoo/Battle Creek Int'l Airport in Kalamazoo.
House Or Rental
Check out Airbnb homes. Search for: Kalamazoo, Portage, Augusta
Hotel
Looking for a nostalgic, summer camp experience? Cabins at the site of the wedding are available for rental for $180.00 per day, sleep twelve (six bunkbeds), and have restroom facilities in the cabins. There is no AC in the cabins, but they are in a shaded area and the weather during Labor Day can range from 70-90 degrees.
Hotel
There are tons of hotels and Bed and Breakfasts in Kalamazoo to stay at. Use the link to find one that meets your needs and budget.
Travel Note
Uber and Lyft are both available in Kalamazoo.