craft fair butterflies

I briefly mentioned the other day that I was going to be doing a craft fair here in Athens the first weekend in December (the 5th & 6th - if you live in the area, please come out!). well, now I'm here asking for advice...this is my first craft fair, and I honestly have no idea what to expect, so any advice, do's, and don'ts would be wonderful! I still have a few weeks, so I'm trying to spend most of my free time knitting away!

Thanks everybody!!