I feel sure that coyotes feed heavier when the moon is bright, as they can see better under those circumstances. However, I am not sure it really has that much affect on coyote hunting success. I have killed a lot of coyotes on days following full moon nights. If you are set up right close enough to the coyotes, they are apt to show up. Nothing is guaranteed just like days after dark nights. Best time to go coyote hunting is when you can.