We will be going on an 8 day cruise, with 3 stops. I have NO IDEA how to pack for DD. How many swim diapers should I bring? How much sunscreen will I go through? A pajama per night or should I bring extras? Did you do laundry on the ship, is it worth it? I guess most things I'll have to guestimate, but if anyone can shed any light with their experiences, I would really appreciate it! TIA!