I reached out to St. Louis County today and I was told that cottage food bakeries in St. Louis County are not allowed to sell at vendor events or farmers markets that I would need to use a commisary or commercial kitchen. However, the information that I was looking up about whether I could have a cottage food business and also use a commisary with the proper permits was very conflicting. If I am able to use a commisary in the summer when there are events this would open up a lot of opportunites.