I have a holiday coming up too, and, as we've been planning it for a year, and we don't have holidays very often, I have decided I will eat while i'm away. My CDC agrees with this and said that although I will be putting my goal back a few weeks, to just enjoy it.
I don't want to go mad, and will try to eat sensibly, but I think the hardest thing - for both of us - will be getting back into the swing of things afterwards.
Whatever you decide we will all be here to support you when you get back. Have a lovely time, and please let us know how you get on and I would love to know how much weight you put on (if you do decide to eat) as I am away for the same amount of time.