I just got back from a vacation for 10 days, it is easier than you think, because there are so many CHOICES than you would have to PLAN at home.
I did go off of it for a day, a planned CHEAT day, and that day I had everything I wanted, but then went right back on it. I didn't gain anything. If you find it consuming your mind.........cheat ONCE and then get back on the plan.

Good luck!!!
But remember don't beat yourself up if you go off for a day, just hop right back on!!

Heidi