I went with the old designated driver excuse but I guess if you're on holiday that wont work!

If they already know you're not a wino, just spit everything out like Trillian said, its what you're supposed to do anyway!

But most of all, don't make an excuse unless somebody asks, otherwise it just draws attention to it!

Good luck!

PS- SO jealous of your trip! If you love cheese you should make the trip to Tassie if you haven't already, its cheese connoisseur heaven not to mention its just so pretty!