Supervised visits, to me, that's it for now.
If someone should call CS, this is a nightmare that you do not want to face.
An alcoholic doesn't understand rules, doesn't abide by rules. It is not because they don't want to, they just can't, the prusuit of a drink is their priorty.
Don't compromise your childrens welfare because you want to give your husband yet another chance to do the right thing. As long as he is drinking and not in recovery it is only going to get worse. Your children deserve better.