We'd be doing a day trip from Corte [mid August] stopping off at the Spelunca gorge and Ota before ending up at Porto probably after about 3pm. I was wondering what the situation is regarding boat trips to the Calanques or if that's not possible, Scandola. Can one just turn up and get on a boat, how frequent do they run [any timetables], how long are the trips and of course how much does it cost[any discounts for kids]??? Many Thanks. Barry L.