I just came back from a week long cruise. The first few days I really tried, but there just wasn't enough veggies and stuff. Even the "spa cuisine" choice was pan fried fish loaded in salt.
So, I decided to enjoy and have what I wanted, but tried to stick to stuff I couldn't get back home. Anywho, I still gained 6.4 pounds (and funny enough, we had 10 family members and all the adults gained 6-6 1/2 pounds too). But the first day back, I started TO and took off the whole gain within the week.
So... I would say be choosy, but enjoy yourself, and then plan for TO upon your return.
Good luck, and HAVE FUNNNNNN!!!!
TURKEY DAY CHALLENGE