Your h isn't unique in hiding his affair. Many, many of them do...even after they have been confronted w/the evidence. My xh hid his affair "fxxk buddy" for well over 3 years until I mentioned something that I knew would cause him to slip up and say something about her.
Sounds like you have a full agenda for the weekend. Enjoy each and every minute of it because you are the prize and deserve to be treated like a queen.
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.