I would emphasize what I believe is assumed in your advice and that is, GET THERE EARLY.
You would be surprised how many people are waiting outside for the doors to open just so they can have first pick.
I would also suggest researching the vendors who will be at the show. Not all breeders are equal. We were fortunate to buy a beautiful Ultramel Jungle from Vin Russo (Cutting Edge Herpetological) at our first show. We didn't know who he was when we bought our first girl. We just thought that he was a really nice guy with beautiful sneks.