I wake up anywhere from 0200-0500 every single morning year round and can't get back to sleep. I hate it. But it is what it is, so I deal with it. Pretty sure my body is telling me it only needs 4-5 hours of sleep, but then I'm super tired after getting up.The hardest thing for me during an elk hunt is waking up early. Big hills, rough country always sucks, but not as bad as morning 3 or 4, 6 or 7.