The Pro Panel System is without a doubt the easiest art show set up.
Here is a quick video showing how you can set up a 10' x 10' booth in 4 minutes. www.youtube.com/watch?v=hyGyaC5zVy0
Pro Panels sells hanging systems, shelves, ladder systems and much more.
I just ordered the ladder tree which is just right to display pottery.
Check out pinterest for booth set ups.