Thanks for bringing these things up. Those are all great questions and not always easy to answer. And you make a good point above about the craft show. This is all stuff I'm going to have to seriously consider and research. I'm not doing shows right now, I'm not even selling anything right now, LOL, but they are in my future plans.
In my area, West Palm Beach to the FL Keys, there's tons of arts & craft shows, farmers markets, etc. all year long, particularly in the fall and winter when tourists and seasonal residents are escaping the cold weather up north. I've been wanting to get out there and be a vendor instead of a customer.
http://www.sunshineartist.com/events/eventlisting
http://www.craftsfaironline.com/