I think Ron's idea using the louvered door is the nicest looking so far. The white paint makes the pieces jump out and having that at the back wall of a booth will draw them in for sure.
Steve, as I look at your booth, it looks dark and cave like. As you are displaying wood items, I think the natural wood shelving makes the pieces disappear and the blue is too strong... again, overwhelming your work.
Light, soft colors help the richness of the wood come out and pull the eye in to look at what it was that made them stop in front of your booth.
It doesn't have to be bright white but even a muted off white would help.
Do you need to have the top on the booth? Unless you are outside, the top might also be causing the cave effect.
Make a sign to hang on the outside of the booth with the name of your woodturning business. Also, think of some photos of you turning a bowl and hanging them on the sides. Something large enough to make them stop and have a look. Doesn't have to be "you' in the picture... just your hands on the gouge with chips a-flyin'.
Again, these photos need to hang right near the front of the booth so that are easily seen as someone is walking down the aisle.
If you can find a couple of photos that will hold an enlargement to about 24x36, I will print them for you N/C and then you ony need to find a framer in your area to mount and laminate them onto gatorboard with a hanger of sorts that can be wired to the top of the wall frame.
Maybe a small sign at the front that says: "Ask me how it's done!" If they ask, you have the first hook in their wallet. Show them in your conversation how excited you are about turning and just maybe, they will catch the bug and be as excited to own an example of your talents.
Hope these ramblings help in some sort of way.