Advice on stbx

Does anyone have advice about my daughters father being there for her birth? To be clear, we are still married but separated (we will be starting process of divorce once she is born). The separation has mostly been on my terms, and he has not always been respectful of boundaries or my feelings throughout the last few months. He is going to be here for the birth, and I am glad for that. However, I am already experiencing anxiety months in advance to the whole thing. I worry that he will bring drama or he will try to “mend” things between us while he is here (he lives in another state). I have no desire to reconcile and I really REALLY just want the whole thing to be focused on our baby. I don’t really want to spend any more time with him than necessary, and I’m also worried about him staying too long. I would like time to spend with my daughter before I have to return to work (I am not 100% sure how much time I will get off anyway) so we can find some kind of a “norm” before I have to go back to working full time. My big thing is I really want to make sure things are controlled and don’t get out of hand. His attitude is “we will just figure it out” but I’m wondering if we should set some guidelines or “ground rules” for the both of us before going into the whole ordeal? Does anyone have any advice or thoughts?