The Disney ships are incredibly stable! Very rarely do you encounter rocking! Even when you do, just stay inside the decks, shopping, watching a movie in the theatre, or hanging out in one of the clubs!
We encountered some rough seas a couple years ago on our first 7 day cruise, but it really wasn't that bad!
I hear those patches really do work well! We didn't use them because we just sort of "got on with it" so to speak!
