Beachlove. The only time I quit drinking was when I found out I was pregnant. It's seems easy to quit the drinking (you have no choice), but hard to acclimate oneself to socializing and familiar past drinking patterns. The vacation might be hard at first, but you've been sober for 37 days. Don't set yourself up. Think about the things you love about the trip and enjoy that.
You don't sound whiney at all! This could be difficult, but your attitude will make all the difference. If need be you could bring some good books and excuse yourself a little early. Hang in there and congratulations!