The last two hunts I have taken an old wool blanket. And you can make fun of it if you want, but when the temps get down in the teens it will be coming with me.
I like the flexibility the blanket offers on stan. Whatever gets cold first gets the blanket, legs, back, neck. Being cold is no fun at all guys.
Sleeping bags work well, but they are pretty restrictive IMO an old wool blanket is the answer.
The blanket is not as restrictive as heavy coats and drops down easily for a shot. In the winter I always keep the wool blanket in the jeep never know when it maybe needed.
I also like wearing a vest to stop my arms from getting all bulked up. Those heavy coats can mess up your shooting.
RayMO