In addition to our cruise docs & passports I would carry any RX or OTC meds and our toiletry products (toothbrushes etc). Just in case one of our checked bags gets lost I would also pack at least 3 or 4 days worth of clothes to include 1 neutral bottom (such as dressy black capris for myself and dockers for DH & DS) plus 2 nicer tops for dinners that could go with the bottoms, 2 sets of shorts & 3 or 4 casual tops for daytime, 1 set of PJ's, 1 bathing suit (and a coverup for myself) along with a spare pair of shoes or sandals for each of us. This way if a bag is lost we can always do some mixing & matching or laundry if necessary to get by. I would try to get all of this stuff into 2 of our carry-ons and would use a 3rd for beer & water. Oh, and don't forget the Downey Wrinkle Release & Clorox wipes.