I won't be able to tour with anybody this year, I just join in any thread about Michigan. I live in Lansing but spend 5 days a month in Traverse City. I think the Leelenau peninsula (NW of TC) is one of the great spots to ride in Michigan. They started the Tour de Leelenau last summer, with accompanying rides if you don't want to race. But I think that's later in the summer than what you're talking about. Have fun. Bicycling magazine once called Michigan "the best kept secret in cycling."