I like the idea of the cake boxes. They do come in small sizes. I used to buy them in bulk when I sold baked goods as a teen. My local party store sold them, but since I used so many, I got a case of them at the restaurant supply store. I think you can get a good deal on them online now. I'd put the slices on small disposable plates so you can pop the piece someone wants right into the box.
I also like the idea of printing labels. You should also have a pretty colored napkin and fork to stick with the cake. The only thing missing is a glass of milk!
You are also a wise woman to sell individual pieces. I adore german chocolate cake, and Rob doesn't. Since there's only two of us, I'd never buy a whole cake that only I liked because I wouldn't eat it all. (nor do I need to) I might buy a pound cake that I could freeze part of for later, but I think I'd smile and walk by your booth if I didn't feel like dealing with a whole cake.
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