My husband and I want to take our parents (age 65-70) and our two kids (10 and 13) on a trip early June. First time to MI, we have 6 days. We'd like to stay a couple nights on Mackinac Island, but I'm trying to figure out if we road trip through the Upper or Lower peninsula to get there. We would fly from Minneapolis and rent a car, so into Green Bay or Marquette if Upper, or into Grand Rapids or Detroit if Lower, with scenic stops along the way to/from the island. Any recommendations which route would be better? I am afraid grandparents couldn't handle much in the way of hiking beyond easy paths, and I don't know what kids would prefer.