I think this outing was done with minimal research and minimal cost.
But in terrain such as Alaska, if you're cheap with your planning and outlay, it means you're being cheap with your life.
The tents they had don't seem to be stove/chimney tents, so I'm even wondering how they managed to keep warm at night, and how they dried their boots and pants out.
I suppose they just built a fire out in the open from?....well, there were hardly any trees to even get wood from!
Maybe they bought it all in Fairbanks, so they'd have even more to cart around - and wood is heavy too.
Do the regulations even allow hunters to build an open fire on that land they were on?
Sadly, I think the pair of them thought this trip wouldn't be any different to hunting in their local Tennessee.....
I'm sad that Steve lost his life, but as the famous saying goes "If you fail to prepare, then you can prepare to fail..."
SK's tent was inadequate even for the lower -48. It didn't have a full fly. Actually, the fly on his looks like a little hat. I wouldn't even go car camping with one of those: if it rained or got foggy, you're getting wet. As you sleep through the night and generate sweat, the condensation will start dripping down on you. Cold damp in everything, including your sleeping bag.
The design SK had is prone to getting flattened in the wind (the sides simply keel over), and where he was camping is a very windy location. You'd need a tent that has at least 3 poles, and is shaped specifically to shed wind (these are hoop-shaped or a complex dome tent). AK's state hunting guide even says what kind of tent you need!
Also, you'd put a tarp UNDER the tent to prevent water from seeping in. I didn't see anything like that. And, you'd tie it down with extra guys to keep the wind from blowing it away.
A tent that large is too drafty for one person in cold weather. It's kinda like sleeping in a barn.
The only thing that tent had going for it was the light color: it was easy to see in tundra.
You actually would not need a heater in the temperatures they were camping in. It would go below freezing, but not a lot. You just need an adequate sleeping bag or two. You also need, very specifically, a closed cell insulating mattress under you. Those are the cheap blue things you can buy at a low-cost department store. Mine is 40 years old: indestructible. They are standard cold weather equipment. They are not comfortable, but they can save your life. There are fancier ones, too.
In Chet's videos, he spent a night in SK's tent and demonstrated how inadequate it all was. Even with Chet's own many base layers, he thought he might die that night.
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Caveat with my statement: I have slept under a pitched tarp through blizzards, freezing nights, and river fog (don't even ask), and managed just fine. I was always warm and dry: if you pitch it right, an overhead tarp can be super nice, and experienced winter campers will use them in snow, partly because you can cook in it (you can't cook in a tent because of CO poisoning). But there were plenty of people around! And SK didn't have the skill to pitch a sleep-tarp correctly, nor the patience, I'll bet. AK tundra would not be a suitable location for this sleep solution.
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I have no idea if they built a fire. If it had been me, I would have had no fire, but a JetBoil. I would have been able to boil water for instant meals, and fill myself with hot drinks. If I needed to, I could fill my Nalgene with boiling water and hug it for warmth.