A vision of Sag Harbor 10 years from now was imagined on Saturday afternoon by more than two dozen residents — lifers, newcomers, year-rounders, and weekenders — at a Sag Harbor Active Transport workshop held in the parish hall of St. Andrew’s Catholic Church. Asked for one word describing how Sag Harbor could be, responses included safe, progressive, quiet, athletic, peaceful, visual, innovative, healthy, green, enlightened, accessible, slow, and sociable.