Nobody can control having urges or not, but we can control whether we act upon them. He has gone through an emotional roller coaster (the trip), and his initial reaction is to crave relief. Over time, he will learn (and I'm talking about "deep learning", not just knowing rationally) that he can manage turmoil without needing or craving alcohol.

Documenting moods is a good idea, as it gives some form of "control" and insight.

You could always bring it up as a possibility, as a possible tool. Or ask his psych to mention it? Ultimately is will be his decision if he finds it helpful or not.