Here are some suggestions I've saved from previous notes. I didn't verify all the links and didn't take the time to turn all the links into hot clickable links so you'll have to copy and paste most into your browser.
Contact the local Chamber of Commerce.
Contact local Arts Councils or other groups that promote art activities.
Contact tourism promotion agencies in your region.
Walk local shows and ask exhibitors how they heard about this show.
Subscribe to Sunshine Artist magazine. They have show listings and a list of "best 100 shows."
Subscribe to Crafts Report. They have ads for shows and some show reviews. www.wfea.org/calendar-event
www.festivalnet.com
http://artsandcrafts.about.com/library/showrate/blstate.htm#reviews
Washington state: http://artsandcrafts.about.com/library/showrate/states/blwa.htm www.washingtonfairsandfestivals.com
Rena Klingenberg is familiar to forum members from her web site http://www.home-jewelry-business-success-tips.com She published an e-book called "The Ultimate Guide to Your Profitable Jewelry Booth."