And you don't warn him about any of this... That's Plan A unless a lawyer says you have to tell him you are taking the kids with you... But legally I don't think you do as long as he has a means to visit them... You can give him that... Agree to visit with him and the kids in a library or somewhere safe... so he doens't know where you guys live.... Don't do the visitation alone... take a friend or get a social worker involved so he doen'st make your life miserable during the visitation.
That's Plan A... but should all be cleared with a lawyer first