Thank you everybody for your advice, and especially for the heads-up that some of the principal cast might not come out (which, of course, is their prerogative). Jamie Parker, Noma D, Poppy Miller, and Alex Price all did not come out. Everyone who did was very nice and super friendly.
I also echo what others said that the stage door was very calm. I think it's because the barricade is so long that it's mostly a single layer of fans. So people aren't pushing or reaching over each other. It was very chill, and the cast was very gracious.
"What was the name of that cheese that I like?"
"you can't run away forever...but there's nothing wrong with getting a good head start"
"well I hope and I pray, that maybe someday, you'll walk in the room with my heart"