Gosh Leadfingers - a couple of weeks is long enough to fall in love, get married, and raise children together.

The usual at the ones I've seen are you find out who your group is at about 10:00 am and you have until 1:00 pm or so to work up the act.

I would suppose that your way would maybe give a more polished performance, but surprisingly the "instant groups" sometimes do pretty well at the ones I've seen. The trick with the "quicky" setup is figuring out - quickly - what talents the individual members may have, and working the arrangement to use what you got (and to avoid making someone try to do something that's beyond them).

John