I was wondering if i have enough time to do both tours, we will be in Santorini from 8:00 am to 9:30 p.m We were thinking of booking the ships excursion wine/ Akrotiri be able to get off in the old port then at 5:00 take a private caldera boat tour for 3 hours, it picks you up at the old port and brings you back to the old port. Our ship does leave until 9:30 do you think we have enough time?