Hey J., here's some advice that might help you make some sales. Take along some materials for cutting up as a demo. You know, like leather scraps, paper, cardboard, rope (do the cutting examples yourself to save on bandaids and hard feelings). Do some tricks with your knives, make it interesting and people will flock to your table.
Above all else, don't sit there in your chair with your arms crossed looking like you have a case of the drizzlin $hits. Get involved! Drive one of your knives down into a block of wood and display it (use a reject from your shop) and promise that the one who can pull it out wins it! Yeah!!! You'll be the talk of the show (dull the edge that's exposed so they won't cut their damn arm off). People will come flocking to your table.
The moral of the story is: get people as interested in what you do as you are yourself and you'll sell knives. That's just my opinion though. Have fun and make lots of money. But, especially try to have fun. Lots of makers look like they're at the dentist getting teeth pulled without novicane. Try to look interested, be genuine. You want to sell knives don't you? Alright then.