I am still a Midwest gal at heart, despite trading frigid winters for searing summers in Texas years ago. So, when my sister called to say she had rented a house on Lake Michigan for five days in September, I was excited.   The Great Lakes were our summer playground growing up. We were a big camping family drawn to isolated locations where we could fish and swim in the cold, blue freshwater lakes. (Three of my five siblings still live close to the lakes.)...