Maybe if you don't think you can stick to it you should look at a maintainence plan for the 2 weeks or consider going very strict induction until you leave for the holiday (to give you a buffer zone)

Otherwise I think you should just concentrate on making the best choice possible whenever you can - choose the foods closest to the plan - if that happens to be not completely legal - if it is the best possible choice, don't beat yourself up about it - any reduction in carbs has got to be better than going off completely!
BTW I'm not giving you a licence to cheat, if steak and salad is on the menu, that is the choice you need to make over choosing that pasta

Then when you come back - straight back to plan - remember this is supposed to be a WOL and has to be a bit flexible in order to enjoy life -vacations are supposed to be stress relief!!