This is all the info on the "secret" entrance/exit from Page 1, Post 8 (Yacht Club). Hope this is helpful and not more confusing. I am severely directionally challenged and it usually helps me to this door from the inside hallways for the first time.
Yacht Club Secret Entrance/Exit
Facing the Yacht Club, the marina will be on your left and the wedding gazebo to your right.
This is the room closest to the entrance to help you find the exit from inside.
According to the small sign you can see in the picture, this door has keyed entry during the hours of 11 PM to 7 AM. The doors locks have been fitted with an RFID chip so that you can gain entry using your Magic Band.
A little more detail about the YC Secret Entrance
Thanks, pixarmom, for the photos and info!