heather, the craft shows aren't too much better here in the city/suburbs...I really miss the days when you knew that you would be making a good amount of money at the shows...
The dresses are really sweet...I don't see any reason for them not selling.
You may need to do a 2 for $ price in the later afternoon...customers love to get that kind of deal. If they are selling for $16 for one...make it 2 for $28 or whatever sounds good to you.
Best wishes for a great show...