Making; Day 2~ Making Stuff

So I am considering doing an art fair this May. You know, setting up the booth, making a ton of merchandise, meeting lots of people, and hopefully selling lots of goodies. There is a wonderful one here in Lexington that I have submitted an application to be a part of. No word until middle March either way.
Nonetheless I have been kicking into high gear to make things with the hopes of participating. If it doesn't work out, I'll have plenty of things for the shops I sell at as well as maybe finally starting an online shop.
Do any of you have advise or thoughts about being a vendor at an art fair?