When I go on vacation, I do my best to stick to my weight loss plan. But my goal on vacation is to maintain weight, not lose.
Having said that, I have gone on vacations that are food-heavy, where I did not want to feel guilty about indulging in delicious foods, and for those I put WW on pause (I stopped tracking). I resumed upon my return from vacation, guilt free.
I have gone on cruises while on WW, and found that the cruises offered WW-friendly foods, like egg-based breakfasts, vegetables, chicken breast, and fruit desserts.
Now that I am following a Food Plan, I will always maintain that plan while on vacation.