Brando,
A drug is a drug is a drug. You are posting in the right spots. Don't worry about that.
However--crack and cocaine. Serious stuff to have around in a home with children. You need to put them first and foremost. Your husband is a big boy--a sick big boy, but still an adult. He must do the work. You have to decide how much you are willing to put up with. You have to decide how much at risk you want to place your children--because they are at risk. You probably know that from your history of living with an alcoholic parent.
Have you tried attending NARANON or ALANON? That is great face to face support and you would have people in your area to call for immediate support when you need it.
Study your options, take a deep breath, lean on your Higher Power and trust your instincts.
Dawn