I'm going to pack heavy, bring the tux, also bring a coat & tie or suit for semi-formal night, probably sportcoat so tha it will also be easy to use for Palo's. DW will dress up formal, but the most we can get out of DS is an oxford shirt, tie, and khakis. He will be 9 when we sail. Since the weather will be good and warm most all of the trip, every thing else that is not formal will be pretty casual and full of cotton, I expect, and in spite of the change from Tropical Night to Pirate Night, we'll be wearing our loud bright Hawaiian shirts. Should be a great cruise.