We have open carry in MI too, however, in the car or vehicle...if you don't have a CPL, it must be cased and inaccessible to passengers/driver. Also must be unloaded and separated from ammo.

If you have a CPL, you can have it in plain sight on the dash board if you wanted too...

Good idea to not only become familiar with open/ccw laws while traveling both in your state, and surrounding states you may visit/drive through.