I haven't done any craft shows but I have done the monthly flea market we have here.
I totally agree with what Judy had to say.
I would display one or two of several completely different items and hide the excess under the table. I tried to make it look like a person was buying a truly "one off" item (even though I might have six more just like it)
and see which way "the wind blew" as far as different things that appealed to "this" bunch of folks went.
Then I could replace the sold items in just a few minutes for another "one off " looker.
I would just remember what was selling at this show for next time.
I had everything, from crosses to puzzles to fret work and even a rubber band gun! Ya just never know!
Rog