If your options are a) show people pictures of your snakes that you took Friday, or b) take out the snakes to show a bunch of people, I'd DEFINITELY go with option A.
I would assume, having moved to a new situation (regardless of type of vive - new people, new smells) is all very stressful for your snakes. Having a stranger (you, because you are a stranger to them still) take them out for a room full of people to see... if I were a snake, not my idea of a fun day!
They just don't want to get eatenI think that is their biggest, and maybe only, worry. Then again I'm not a snake so hwo do I know.
Pesonally it took one of my snakes months to feel comfortable out of her vive around more than one giant human. She would get so scared around two, I think she felt ganged up on.