Ryan -
Michigan, as mentioned, has a ton of great public golf. I would say you would need to wait until at least early June, if not later, to get solid conditions and weather.
Kingsley is unbelievable, but also private. If you could swing it, certainly worth seeing.
Greywalls is really spectacular, public, but way, way north.
I like Arcadia Bluffs. Many here do not. It will play soft, but you get a lot of eye candy with the lake holes and lake views.
The courses at Treetops are good resort layouts.
Black Lake and Thousand Oaks are worth seeing.
I have not seen The Mines, but here it is really good from another GCA member.