i will be in alaska in may also. when i went to glacier bay last sept i took sweaters, a hoodede sweatshirt, an unlined nylon hooded windbreaker, comfy sweats and a nice pair of black pants with two different tops for casual diner and of course two formal outfits. t-shirts can be bought in the ports very cheap if you need them. BE COMFORTABLE. that is the key for this trip. and no matter what, take your most comfortable pair of shoes for the ports and tours. i am going to take my cuddles ( top and bottom ) this time for out on the deck. also i am going to take my very lightweight pair of gloves and head wrap for the deck on glacier day. the most important thing to take is -- a great fun attitude, anticipation for the cruise and more money than you think you will need. and of course lots of film or memory sticks for pixs. we are going to have a wonderful time and like you i cant wait to go. have a great time.