Festival advice

[eddiesimages]

I am considering selling some of my photographs at area festivals this fall. Can anyone give some advice on how to set up the booth? Particularly, how do you hang the prints to display them? I have been searching the web and don't want to spend the money for one of those professional display units. I haven't been to many craft shows or anything like that, and didn't pay much attention to the displays at the ones I did go to. Any advice on selling at these art shows would be appreciated.