Nikki, don't worry about getting there if you aren't planning on going anyway... Definitely don't spend a lot of money on a plane ticket or anything! It's no big deal. I can give you all of the information.
I can't really predict how many people will attend the meeting or whether it will be a very productive one (it's always different).
But really don't go out of the way to get to STL for the meeting.
Shane