I can't emphasize what Khmetalwork said enough - never sign up for a show without visiting it first. The only exception for me is a show where I KNOW it's my target market (concert venues, for example, are my favorite shows to do, I always do very well there.). Shows are expensive to start doing, especially once you factor in all the "hidden" expenses, like gas, food, etc. You don't want to do a few bad shows, because of poor planning/not visiting/not learning enough about the craft fair/etc. and get burned out on doing them.
Loads of people say to just jump in and do a craft show, but I highly disagree. Learning from experience, or "getting exposure" is great, but how much are you willing to pay for the experience, or the small bit of advertising you may receive from the event? Would that money be better spent on -actual- advertising? Would it maybe be better to help a friend at a craft show before taking the plunge and getting your own booth? These are all things you need to ask yourself before deciding whether or not to do the event.
If you have answered all of these questions, and decide that the event is right for you, then really work at it. Build or purchase a beautiful display, that works with the aesthetic of your items, and is easy to transport. Make enough product to cover your booth two times over, just in case. Bring snacks and a light lunch, so you don't have to eat show food. Set up your display the night before, in your living room or garage or somewhere, to ensure everything fits and looks good, it will help to avoid snafus on the day of the show.
and lastly, join this team ----->
https://www.etsy.com/teams/8070/craft-fairs-its-a-living , it's awesome.