BM says he first spotted the elk as he approached Hwy 50 from CR 225. He said when he got up to the intersection he let them cross. He said there was one big bull he wanted to see better. That is why he turned left.
The elk crossed and went up the old washed out road. I’m attaching several shots from Google maps that, I think, identify the road he is referring to. It is about .105 miles from where BM was sitting at that intersection. Question: could he see them from that distance in the complete early morning darkness? I don’t think so.
My bil is a park ranger in PA. For his job he use to carry a spotlight in his car. He never used it for hunting as it was illegal, but I remember him using it to show me a herd of deer out in a farmer's field. I believe it is illegal in Colorado to use a light or night vision equipment for hunting. But Barry was not hunting, just observing, or so he says. And he doesn't seem to be overly concerned about following the law. He could have been tracking the elk with either a light or goggles. I wonder what LE found in his truck.
Also, per Colorado hunting regulations, you can only hunt for elk in season (Sept/Oct/Nov) "one-half hour before sunrise to one-half hour after sunset."* This is supposed to give you enough light to see the animal and enough light to retrieve the animal. Just as an aside, while animals sometimes drop right where they are shot, some animals will run after being shot, even if it's a "good shot", and you will have to track them. According to wunderground.com, civil twilight (sun is 6 degrees below horizon, but there is still enough light to see) in Gunnison was 5:32 AM on May 10, 2020.
*https://cpw.state.co.us/Documents/RulesRegs/Brochure/BigGame/biggame.pdf