Its hard to say. Waits are very typical here because so many people try to do the same thing you are and if they get done early, they linger!
If you can't get seated, you can go out onto the observation deck and see them. If you are seated but not in a prime spot to see, you can do the same thing.
I would just keep that time and know you can see them on the deck if you can't get it all coordinated. Maybe tell them at the podium you are going out there to see them to let them know so that if they page you while you are out there, they know you'l be back in?