How will I relax without alcohol?
Don't kid yourself. You will not relax WITH alcohol. It will just prolong the misery. Remember those hangovers? The sickness? Do you still believe that alcohol will somehow enhance your life?
Look at your vacation as a chance to strengthen your sobriety. Many of us don't get that kind of opportunity & had to go through early sobriety faced with non-stop challenges & responsibilities.
What your husband thinks is kind of irrelevant. My wife once told me "It's a good thing you quit before it got really bad." And there I was a physical, mental, and emotional train-wreck! That wisdom I've heard over & over "do it for yourself" is absolutely true.
I sincerely hope that everything works out for you.