I am going to assume, hopefully correctly, that you were referring to 1 am to 7 am, vs pm. The night before, he may have also had his friend Howard with him. It does not say when Howard arrived, only when he left and was driven to the airport with Adam, Jonah and Rebecca. Since there were several phone calls between Rebecca and Howard, he may have stayed with Jonah the entire stay.
This would have made it possible for him to then stay at RMcDH the following nights, as it is for family members only, of which Howard is not moo only.
As for the family utilizing RMcDH, it is convenient, close proximity and fairly safe, I am sure. If they had presented a pattern of staying by their childs side as much as possible, I would not question it in fact. imoo this did not seem to be the case. I can not imagine leaving my childs side in the first 24 to 48 hours, as those are usually the most critical hours.
Imoo, Max was NOT stable. He had had a cardiac arrest, that had lasted 25+ minutes. Doctors, nurses and security would have had to pry me away. What if Max showed any responsiveness, was restless, seemed to be in pain. The nurse can not be by the patients side at all times. I would have had to be there. Of course everyone is different. This imoo only. But, you could not have gotten me into another building.