As others have stated some markets are producer only. Many local farmers only participate in producer-only farmers markets otherwise they are not able to compete with vendors selling items from overseas or California.
Since the economic downturn, you are seeing more vendors reselling products at some market or at roadside stands. They are trying to feed and support their families. For some people, there is no producer only concern-only concern for affordable prices.
The key is to talk with the farmer and ask questions(when it is not too busy) about their growing practices, when their items were picked, where there farm is, the acreage etc .Most farmers love farming and have no problem speaking with their customers . Also, look at the products, the signs at their stand etc. Some allow you to taste before you purchase and there is nothing like a slice of ripe cantaloupe on a summer day. The farmers market in Howard County at the library on Thursdays has some of the best I have tasted.
Organic farmers have certification local/natural means local/natural- the term does not necessarily preclude fungicide, herbicide and pesticide usage. In this area in particular, rarely are any tree fruits organic- the humidity is the major factor. Again, talk to the farmer, for some that raise bees and sell honey, they do not use chemicals due to concern for the bees and honey production.
The Mount Rainier's farmer market will be starting in June.This will be a producer only market. The city is committed to bringing additional fresh fruits and veggies o this growing area. I am working with the city to make this happen.