First of all, Congratulations on winning the New York City regional. Winning a regional is not easy and to do it as rookies is even more impressive.
The Championship Event is an amazing experience that has been well documented in several different threads on this forum. The link below is to a thread that is already discussing several of your questions and there are links to other threads about Championship as well. Good Luck, see you in Atlanta!
http://www.chiefdelphi.com/forums/sh...ad.php?t=84421
Also, seeing as your on the drive team, wear some comfortable shoes
http://www.youtube.com/watch?v=YSjKVDgnWwY