I have done a lazy sampler bag, where I took advantage of the fact that I can just call it (vegetarian) SOAP and I didn't include my ingredients. I printed a label that had check-boxes for all of the soaps I had samples of, and put an X next to the soaps in the bag. If anyone wants to buy more (or look up ingredients), they will be able to identify the soap from website photos. I charged 1.50-1.99 for 3 or 4 samples. At a craft fair, they're a nice way for people to buy something when they really don't want to. (I'm OK with people not buying anything! But I know that awkward feeling, and I'm OK with making 1.50!)
I do plant to do the labeling nightmare and properly label the various samples, but obviously I'll be charging a lot more for the time and labeling cost.