I always tell my Incubator Village participants to plan for 300 samples per day, the samples should be small, and easy for you to prepare, in the case of popcorn, you could consider having a prepackaged item and 1/2 ounce would be plenty. You can also prepare your samples at your booth, with small paper cups, placed on a tray or the table, easy for a buyer to pick up and taste. If you have multiple flavors, think about just a couple of kernals per sample. You can always give someone more if they take a fancy to your product. I also reccommend that you have a couple of small gift bags with a sample set tucked away ready to hand out if you meet a buyer that is really interested and would like to take a snack with them. Congratulations on joining the Specialty Food Association, we are glad to have you as a member.