You do know how he will likely be. You also know that now is the time to negotiate. Later, you'll have nothing to negotiate with. Until then, you have a place to live and a can be around to raise the kids. Don't give that up if you ask me. The trick here is to make it so you a) don't have to go back to court (costly and draining emotionally as well) and b) you have the kids best interest at heart. You do NOT need to negotiate with him. That's what you're lawyer does for you. You won't get anywhere. If he's trying to send you things directly, have him send them to the lawyer only. No response from you is needed. That takes the burden of his harassment off your shoulders. Believe me, that's worth the money you're paying your L. You only need to talk with your L about the deals and take the emotion out of it. Mostly anyway. He'll filter the junk based on your criteria and his knowledge, and that's a combination that won't be beat.
Hopefully you don't have to respond to H directly at this point. And you are not being unreasonable, if that helps. The judge is bound by law and case history to favor the kids, not you nor H. It's your L's job to make sure that happens. Let him work for you.
Take the pressure off of you, WH. As much as you can. Let the L know about H's past history and your concerns, and see what he has to say about a strategy to come to terms. Let him know about the combative situation and see what he feels he can do about that. You may be pleasantly surprised.
Peace, AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."