Hiya,
Well, if this is going to be the last holiday you ever take, then I would say do that. But -

- I suspect there will be other holidays?
Point is - you are already investing time, money, and emotions, etc., in this diet. The diet is an abstinance diet where to get the best, and longest lasting benefit - you need to stick to it.
If you look back through a lot of previous posts from a lot of people - they felt strong enough to do what you described only to then struggle endlessly to get back on the "wagon". It is NOT as easy as it might seem.
I totally understand your desire though - but I would say do NOT give in. I went to America for a month in summer, I took 120 packs with me and did not bring any home with me - stuck to it, through birthday celebrations, baseball games, bbqs, etc. It was blooody hard - but I managed.
And I will tell you what!

There is NO greater feeling then coming home from a holiday 20 pounds lighter then when I left - made it ALL worth it, because I knew there would be other hols.
So -lol - best plan, is to keep the course you are on now, and be rewarded with a further loss. What souvenier would be better then that?
Then when you hit goal, you can go back and celebrate proper.
Good luck!! you can do it!!!!
xx