Somehow I missed your request earlier. The Decatur show has been OK. The best thing to do is go ahead with it and see what happens with your work. As I've often put it, it's a frog worth kissing. While you're there check out the various areas for a space request the next time you apply. They may or may not pay attention. I think the street is the best selling location but you have to set up that morning.
I'd give it at least two years in a row before deciding whether it's your kind of crowd.