"(Oh man, why can’t I slip into a 24-hour coma and wake up in time to go to the expo? This waiting is killing me!)" ROFL!!!!!!!!!!!!
My advise: Try a bubble bath and some chamomille tea. j/k
Take a laptop along (hopefully you'll have internet access somewhere). From my own experience I know that I often find myself looking at a snake and have no clue as to the rep of the breeder, but can find info about him/her usually online.
Sounds like you are well prepared, so all else there is to say is this: Have a great time and enjoy the expo!