I'll be your friend haha
I'm also from Michigan.
I have yet to find anyone else. I havent been looking too hard though.
There is the Woodward Dream Cruise (which i'm sure you've heard of) the third saturday of August I believe. I think it's a week or a few days long I could be wrong.
us 131 mototrsports park isnt far from ya. also there is gingerman which is a road race track in my home town of south haven. the country radio station does a huge weekend consort thats free. or it used to be free lol. last i knew it was called the b93 birthdaty bash.