Talk with a local lawyer. It's very likely that a deal can be arranged and you can move n and forget this. 
In this economy, it's highly unlikely that Michigan would extradite you. 
But, your name is probably in NCIC. 
You get stopped by a copper, she runs your name, gets a warrant hit, arrests you, you sit in jail a few days, they let you go. 
This can continue for a very long time. 
Or, they might come and extradite you. 
Why not fix it, instead of rolling the dice?