For what it's worth, the feedback I've heard over the years from the members is that they (we) really like the L shaped layouts when we can do them.
So, how about doing an L shaped layout like we did for a couple of previous (2010 and 3011) Garden Ridge shows. They're on the website under "Articles". No need to start from scratch as we know they fit -- if we're getting the same space? The May 2010 was an L shaped 6 X4 and we managed to fit it in nicely. The May 2011 was a 6 X 3 and it also fit with a happy fire marshal and show coordinator.
Bill