Drinking while breastfeeding?

My baby is almost 4 months. This is my first time exclusively breastfeeding. We are going on vacation in 3 months and I was considering having a drink or 2 while out there. I was doing research and just wanted to clarify..

So the alcohol eventually leaves your breastmilk right? It doesn't stay in it? I wouldn't need to pump and dump? I would be able to feed if I feel sober or as soon as I feel sober?