Thompson / Grand River Valley KOA
Located only 4 miles off Route 90 Exit 212/Route 528. Take 528 South 2 miles to Ledge Rd. Head east 2 miles; campground is on the left. Road is dirt for about a mile.
If you would like to stay off dirt as much as possible. Take 528 South past Ledge Rd. Take the round about in the Thompson Square and head east on Thompson Rd. Take a left on Ledge Rd. at the bottom of the hill. You will still be on dirt but for a much shorter amount of time... less than 1/4 mile.