We are doing the 7 day eastern in August, my dd age 11 has a few nice dresses, what you would wear to a wedding, with nice shoes (thank you target!!!), my ds age 4, I will either buy or rent a tux for him and my DH on the formal night, it will be fun! I consider it all part of the "cruise experience!" You can find tuxes on e-bay for little boys for under $40.00! I figure what the heck. The tux rental for DH is $85.00 he has shoes. Considering what you have already paid for the trip, this in nothing.