Display is the most important factor when I do craft shows. When someone walks by, if they can't see what's for sale they won't come in for a closer look. For example, I had a ton of mug rugs in a basket. No one was looking in the basket. So I took some out and laid them on the table next to the basket. Then I started selling them by the handful.
Around here, craft shows are not doing very well compared to years ago. Now it seems that we only sell items under $10.