Day 4 is great and I hope you continue on this road. My suggestion is to take the focus off your husband and his drinking, and that includes his suggestion for you to have a couple of drinks. You know that won't work and that's all that matters. I know that I needed to focus completely on myself during the early days. He will stop drinking when he's ready or he won't.
As far as your vacation - I wouldn't have gotten through stopping at a brewery anytime during the first months of recovery. Can you consider doing something else while he is at the brewery - maybe some sight-seeing or shopping?