It's our second cruise, but I can't remember from the first time. Do they (the ship) provide towels during shore excursions? Or do they mind if we bring ship towels with us from the pool or something? I know there are towels in castaway cay, but we are going to a beach excursion at St Thomas. Just want to know if I have to bring towels, or if we can use theirs to cut down baggage space. We leave in two weeks!!!