[oblib]

I can say without any worry of being proved wrong that it is very easy to warm that tent to 80+ degrees with even a small campfire like the one seen in the video with my grandson bouncing around inside it.

I use a layer of thicker branches about 3" in diameter first, then I use smaller diameter sticks in layers on top of that. When you light that off the smaller sticks burn down and create a bed of coals on the first layer that keep fuel burning as it's added.

By design that burns low and slow. I'm also burning deadfall from hardwoods, Oak and Hickory by choice, and because that's what's growing in our forest here.