Sail around the Greek Isles? The mystery’s out on Mykonos, Santorini, and even Patmos?yet on the lesser-known islands of Antiparos, Paros, and Pano Koufonisi, the sea shores are pristine, the tavernas are rural, and the pace of life is ecstatically moderate. There are not really any clubs, uproarious eateries, or very good quality shops?but then...