With the success of shows like The Great British Bake-Off, you should find it easy to get participants for this one! Get a panel of judges (or ask the public to vote) on a variety of baking categories. You can even sell the top performing entries off afterwards for some extra funds, and hold this in tandem with the craft fair or another similar event mentioned above to boost the attraction.
Guided Tours / Open House
Collaborate with a local landmark or venue that isn’t normally open to the public and arrange a day for guided tours. Sell tickets in advance. Also offer concessions.