The day after is fine... lock teh hosue down like you suggested pup, and when he comes home the next day then or something.
I just figured if his kids SAW him coming home drunk it might wake them up to how real and serious this is for them too... I know they are kids, but its these times when it sgood for them to learn what being an adult means... and confronting a wayward family member is good growing up trainign for them... better now than when they are married and their spouse is out on the town who knows where...