Boy, you guys would be fun around a campfire...
I would like to recommend to everyone a fine 62 page publication called "Traveler's Guide to Firearm Laws of the 50 States", by J. Scott Kappas, ESQ. Goes about $10 and has a 2002 copyright.
One page is dovoted to each of the states, and there is a scale across the top running from Total Prohibition to Total Freedom.
MI rates a 59 score, and looks like vehicle transport is a big problem there. Handguns may not be carried in the vehicle without a license to carry, but MI recognizes all out of state carry permits.
You may transport a handgun without a permit ONLY if 1)you are a licesnsed MI hunter, 2) a member of a MI recognized shooting organization or 3) changing addresses. Even then the handgun must be unloaded, placed in a secure case and stored in the trunk.
Long guns must be unloaded and at least one of the following: 1)broken down, 2)enclosed in a case, 3) placed in the trunl, or 4)inaccessible from the vehicle interior.
You will never believe the State with the highest score. On page 51 you will see that VERMONT allows you to carry hand guns concealed without a permit. Long guns may be carried openly or concealed in any vehicle, including the passenger compartment. Long guns cannot be loaded becuse it makes the enforcement of GAME LAWS easier. So, you can fly into Vermont, load you handgun and stick it in your pocket...that's a score of 100!
In this part of the country, liberal means free.