Just a P.S. - Please realize that alcoholism is progressive. It will only get worse if he doesn't get professional help. While these issues only come up once a year now, soon, if he continues to drink, they will occur more often. Soon it will be every 8 months, or every 6 months, or every 4 months.
What you just got away from is the best it will be unless he gets help for his drinking, LOTS and LOTS of counseling, and works a STRONG program of recovery. This is not assuming on my part, it is a fact. But then again, his issues are FAR more than just the fact that he drinks alcohol.