People do place custom orders at shows. You should make sure to get a down payment so people don't decide to back out later.
I think people like to see stuff being made. You might want to reconsider your decision. I wouldn't worry about all of the noise. You may find that it attracts more people. I don't know how much equipment you need, but you should consider taking enough to be able to make one or two of your most popular styles. If the show is slow, you'll have something to do. If not, you can go with your custom order idea.