I have been following your story and cant't believe this horrible situation you are in.
As far as the hospital visits go, I agree with having a no visitors at all rule at the hospital. Then to ensure your family don't miss out, have them call or text DH when they arrive and he can meet them in the carpark and escort them in.
Good luck! I hope all goes smoothly for you and the birth and days following are as special as they should be.