Had the same thing happen to me at Carter Gap shelter while I was alone in October many years ago. About 30 minutes after they quieted down, I was just falling asleep when I heard a panting sound. Shined my headlamp at the sound and two glowing eyeballs peered back from about 20 feet away. Threw a rock and the coyote took off. Nothing the rest of the night. Didn't get much sleep!