Car-free Mackinac Island shines amid autumn colors after the summer crowds have cleared out.Vibrant trees lining a street on Mackinac Island in the fall.Credit: Courtesy of Mackinac Island Tourism BureauFall is one of the few times of the year when life naturally seems to slow down. The flurry of summer comes to an end and routine returns. And as it does, the leaves begin their own slow evolution—putting on one final display of color before wint…