i was also on weight watchers- i lost about 38 lbs.
this is what i did last week in disney-
we were in a timeshare so breakfast was easy, just had my fiber one. lunch always a salad w/ low fat dressing. dinner was different, i could'nt find to many low fat meals that i would like, (i am a picky eater). i did end up gaining 6 lbs. when we got home, (last week, july 1). i did loose it though 1 week later- i'm back to my weight before i left. just remember if you do gain anything on vacation, you will loose, as long as you go back to your normal eating habits.
good luck and just have fun.
~sue