I don't know what the Arkansas laws are. I spoke with the city councilman that runs the small farmer's market. He said as long as it is mine, eggs or produce, just show up. I'm not allowed to sell something for someone else though. It is small. If a half a dozen people are there selling something, it is a lot.
The one in Fayetteville has been in the paper lately. One issue is about allowing dogs. The other that I found funny was about allocating space for politicians to set up campaign booths. The farmer's market organization wants to put them sort of off to the side while the mayor wants to put his right in the middle. The mayor won, by the way. That Farmer's Market sets the prices for the produce. All vendors have to charge the same thing. At the small one, charge whatever you can get.
The big one has a board with a chairman and an official agreement with the city. I think it is a for-profit organization, but I'm not 100% sure on that. The smaller one is held on ground the city owns with the city councilman responsible for it hanging around to assure that everything goes OK. It is more of a convenience for the residents. Maybe the way they are organized (or disorganized) has something to do with what rules and regulations you have to follow. I believe the big one collects taxes but am pretty sure the small one does not. Last year you did not even need to pay a fee to sell there.
These are two farmer's markets within 20 miles of me in the same state. They have totally different organization, rules, and regulations. That's why I think it is important to talk to somebody in your local farmer's market organization instead of relying on somebody in a different state.