Mady Allen is planning a big bash for her Sweet 16 birthday — bigger, even, than the year she actually turned 16. Allen is another Mount Desert Island leap year baby. At age 64, she retired four years ago from a 30-year teaching career in New Hampshire. She now lives at the family home in Somesville, where she used to help her parents run the Mount Desert Campground every summer until they sold it. Early this …
