For over 40 years Mackinac Island has been car free. Instead it has been dominated by horse drawn carriages. In fact Mackinac Island is also home to the only state highway that also has a ban on automobiles because it encircles the entire island.
I can see the need for a place without cars, especially since I lived for a good amount of time with the Amish. Getting away from the rush rush life of cars is a relief. Spending a few hours in a horse and buggy makes life seem just so peaceful. Besides feeling like you have jumped on a time machine and are back 100 years ago.