Hi Darron,
I dont know about men from Michigan fighting for the CSA although maybe there were a few. Bloody Bill Anderson and his friends were from Kansas and they fought with Quantrill who has you know was from Ohio and never lived in the South if you dont consider Mo has a Southern state. Per Joseph T. Glatthaar Chair of History at UNC Chapel Hill in his book "General Lees Army" approx 5% of Less enlisted men were residents of Northern States who lived south of the Mason Dixon line when the CW broke out and then joined the CSA Army. The 2nd in command of Mosbys Rangers was a former Union Officer. Per Edwin C Bearss Historian Emeritus US Natnl park Service in his book "Fields of Honor " men from Md even has late has 1864 would sneak accross Union lines to join the ANV. In Mo there was constant clandestine recuiting of men for the CSA Army who had a real risk of capture or death both in Mo and Northern Ar yet some did manage to get through. There may be other examples thats all I know for now. let me know if you find out more.

Leonard