This ought to get you started... Right off the bat it looks like carry in a school or property is a no-no (although they have an exception for parking lots?)
I recommend you look at the actual laws and interpret them your way, this page I'm linking you to is just someone else's interpretation as well.
http://www.handgunlaw.us/states/michigan.pdf
Here's another from the NRA:
http://www.nraila.org/statelawpdfs/MISL.pdf
Regarding the mesh bag, I don't believe OC is legal in your state... If you're carrying concealed, it probably needs to be fully concealed and out of view of the public.