We don't really need a wheeled carry-on for our airplane ride so I am hoping not to have to bring one just for the ship boarding day. I am thinking if all I need are travel documents, passports, swimsuits for the kids, and a camera that perhaps I can just bring a backpack?? Or, do I need a traditional carry-on in order to have clothes for dinner and pajamas? I guess it would depend on what time we should expect our luggage in our room. Any ideas? Thanks!!