The best bet is to go to the DNR website. Lots of info but nothing mounting to a whole lot of pigs just yet. 2-5 yrs from now you will see them everywhere there is water and food, and we have a lot of that. I plan to go this Feburary, one of my customers have asked the same question. Midland and Saginaw area has the most from where I live and the UP has a pack in some areas. Like I said take a look at the map on the DNR site you might just stay home. Maybe 300-500 hogs in this whole state might be hard to find.
Pat