The first one is a little tough, especially so early in sobriety.
Just remember, it does get better, lots better. I am on my fourth summer vacation since recovery and it's fine, just fine. I have taken up new interests for vacation fun and they are so much more rewarding than before!
Have a plan, phone numbers, leave if you have to. You can do this. Take walks, read, all that. Next year it will be something you look forward to, not feel anxious about!