Whispering Waters Campground is just to the northwest of Hastings Michigan by about 5 miles. Hastings is in the middle of a square formed by Grand rapids, Kalamazoo, Battle Creek, and Lansing. About 45 minutes from each. It's about 4.5 hours from Chicago, 2.75 hours from Detroit.... you get the picture.
Map (zooming controls at the bottom of the map)