I don't know what sells these days (I stopped doing shows years ago although I am making some things for my church's show this November) but I was going to suggest you display "up". Since your flat table space is limited, arrange your products on different levels by stacking fabric covered or draped boxes. If they will let you (and you have one) have a screen (like a room divider) to the side or behind you to hang items on also. The more you can show, the more people will stop to look. My experience has been that most people 'browse' and won't take the time to dig through piles. Best of luck to you!