All I can say is that I did maybe 3 years ago. I "decided" a week before going on holiday that I wasn't drinking and told my wife as much (the real reason that I "decided" was that I'd gotten drunk, gotten into trouble in a bar and was scared/embarassed/suicidal/humiliated etc). My wife was astounded when I told her and even more astounded when I didn't drink.
Can say it was super easy but before going I was quite determined and the best thing was how great I felt about not drinking every morning when I woke up. The holiday was not dictated by my drinking and was thus relaxing also.
I felt so good and proud about myself when I came home.
As for my I'm flying back to the UK later this year and I won't be drinking. I've made sure of this by arranging to pick up a rental car at the airport. I'll have my kids with me so I won't let myself mess it up.