Pepper and also white vinegar works wonders. Sprinkle the vinegar all over the hair of the animal before you begin and rub some on your arms, hat, etc. Not a hornet or yellow jacket will touch you. Carrying a sloshing bottle of vinegar is another issue though. My moose dropped VERY CLOSE to a basketball sized hornet nest. They were everywhere once the gutting began, but not a one even came close to me.