B, You are correct in the fact that you need to establish a good working relationship w/your h when it concerns your children. He needs to know if things aren't going well or something needs to be discussed w/him w/respect to the children.
I'm hoping and praying that he'll meet you half way when it comes to the children.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.