Until he can prove to the court that he is sober and clean have your attorney request 'Supervised Visitation.' It is not right to subject your children to a drunken father.
Also, please get yourself tested. With his drinking you cannot trust anything he says or doesn't say.
J M H O
Please keep posting and let us know how YOU are doing, we do care very much! Have you tried alanon? That can give you some local face to face support that we all so desperately need some times.
Love and hugs,