Treylis
Member
Hmm, according to packing.org:
Open carry of handguns is legal except in certain areas (see restrictions), some municipalities, and in your vehicle. However, open carry is not common, and most likely you will be hassled (try carrying openly in Detroit). Also, as soon as you get to your car you have to meet the other requirements (unloaded, etc.). It is a real hassle to carry openly in Michigan.
No license is needed to carry a pistol as long as it is exposed. However, should a person cover the pistol during inclement weather with a jacket or coat or get into a vehicle, the pistol would be concealed, and the carrier would place himself in jeopardy unless he possessed a concealed pistol license. Per Attorney General's opinion #3158, a holster, in plain view, is not considered concealed.
See also:
http://www.michigan.gov/msp/0,1607,7-123-1591_3503_4654---,00.html
Wow, yeah, I'd especially advise checking out packing.org's section on the car/gun laws of your state, which, I must say, are pretty ridiculous. ;-) That'd probably be the biggest hurdle, unless you tend to walk everywhere.