Am I being fair

I am currently going thru a separation and we have been separated for 8 months now and of course our son has been with me. He's about to be 1 I'n a few days and my husband lives an hour away and has been asking for him to come spend the weekend with him. I want to be fair and let him because I want my son to know his father but here are my concerns, when he goes to sleep he sleeps like he is in a coma, I'm so scared he will not hear my son when he wakes in the middle of the night. Next the bed we use to share is so high that he moves around a lot in his sleep and I'm afraid he will get hurt by falling off the bed or the steps is right by the bedroom and he doesn't pay anything any attention especially if he's on the phone or messing around with his tablet and I can't Express these things to him and have him just listen because he is such a know it all person and when things don't go his way h.e becomes angry. I know he is his son too but I know I won't get any sleep at night because I will be up worrying about his safety. What are your guys thoughts?