Please don't be discouraged! It may have had nothing to do with your soaps. Do you know how they were presented? Presentation has a lot to do with how people perceive a product. People definitely react to the appearance of someone's display at a craft fair. You don't mention how the fundraiser was set up. Was it something like a blind auction? Did people have the opportunity to read your labels and sniff your soaps? Many things could have been a factor.
I just finished doing a craft fair. I did very well. Across from me was a talented young girl who was painting Christmas ornaments. They were lovely. But......she had no table covering. She had no way of displaying her finished product. She actually took the scarf off of her neck, laid it on the table and put some of her ornaments on it. She had all of her paints, brushes, glue, etc., out on her table as she painted the ornaments. Although the finished product was lovely, her table was a hot mess! She mentioned to me later that she didn't do very well because of where her table was. I didn't have the heart to point out that I was right across from her, and had done very well. Now, I think I should have said something.
So please don't assume that it wasn't your soaps that didn't sell, it may have been the way they were presented.