I wouldn't get in too much of a hurry - if this show is anything like the shows in the St. Louis area, there will be damn few to zero deals, except that you might find a case of ammo that a shop doesn't carry. Otherwise, you might as well buy from your friendly gun shop and start cultivating that relationship; you can certainly buy anything you want for the same price you'll find at a show. Buy accessories from internet retailers for the best prices.
Gun shows are most useful for finding unusual stuff that a gunshop won't normally have in stock.
If you get rejected during a NICS check at a gunshow, the dealer has a couple of options. If they are local, then you go to their business to pick up the rifle when the check clears. If they are out of town, then you can get a local dealer to transfer the gun, or drive to the out of town location to pick it up.