My tip fo this post:
bring along the Shout portable stain treat wipes. Handy when you spill chocolate on a white blouse. Also some liquid cold water wash to do delicates in the sink. Put it in a small plastic medicaine bottle, and don't take the large container it comes in.
If you plan to do laundry, take your soap in a baggie, and dryer sheets too. That is if you are on a long cruise, say 10 or more days. I never do laundry any way, just buy new things. lol