I have been struggling with hanging my art work at shows for years and my thick canvas walls are very difficult to put the drapery hooks into to secure my paintings to the walls. After several years of pinching and stabbing myself with them, I finally took the plunge and got an amazing new hanging system of cables and grips from propanels.com that is phenomenal, easy to use and store, and looks very professional.
If you already have pro panels you won't need these hooks from Rubbermaid but I do since the 1" hooks won't go over the top of the canvas wrapped in 1 1/2" pipe. There is a perfect hole to put the hooks into and the part that goes over the canvas is padded in black so the canvas won't get damaged from the hook.
What's really amazing is that the cable caddy rolls up into a neat roll that takes up very minimal space, yet stores those very long cables for you when needed later without having them turn into a birds nest from some fishing rod nightmare where the line just blows up on a cast on the reel. This system is not for everyone but its right for me. You can get the cables and grips from: http://www.propanels.com/hanging-systems/. The cables cost around $16.00 each and it takes at least six cables per booth side to hold your work. It's not for the faint of wallet but it sure does make your display look professional and speeds up the hanging process.