I say, leave all your WW stuff at home. Forget about it. To me, taking your WW stuff on vacation is not that much different than the business(wo)man sitting on the beach working the cell phone...
First thing in the morning, get into the gym, find a bike or treadmill, and push yourself for an hour, non-stop. One hour of head-down, gallon'o'sweat, cry-fer-yer-Mommy all-out effort.
Eat whatever you like,
in moderation--but emphasize things you don't get all the time, if ever. Seafood, fresh fruit (screw the apples and oranges, go for the passion fruit, papaya, mango, etc. if it's available!

)... emphasize anything you can't make at home, or buy locally, or order in the diner down the street.
While trying new foods, I'd also take advantage of anything "new" the gym or health spa has to offer. My community is so small that I've never been able to try spinning, yoga, or Pilates--but if they were available on the cruise, I'd try at least one of 'em every day!
You'll have the rest of your life to work at your job...
that's why you're taking your vacation, isn't it? Why should the WW program be any different?
I think a certain amount of diligence will be necessary--but don't deny yourself a bite or two of something from the late-night buffet just because,
"Oh fooey! I'm out of points for the day!" This may be your one shot at something like this. Take a bite of everything, savor it, breathe deep, let it flood your senses. There'll be plenty of time for counting points when you get back home.
