It looks to me like he seriously shaped up after the trip, probably because you were seriously expecting and insisting on that from him. Keep it up and he might just behave himself from now on. Slack off, though, and I would put money on him going back to his old tricks.
Can you stand to be in that role, day after day for years? If so, go for it and you've got a pretty good shot.
a fine and enviable madness, this delusion that all questions have answers, and nothing is beyond the reach of a strong left arm.