I found my last wall tent would hold the heat for a bit.
In -10. The stove would be almost totally out by the time you felt cold
Woke up
Many times in the morning to the stove totally out
I use a canvas wall tent with a metal pole frame. 11x14, with a hole in the roof for a chimney.
I'm getting to the point where I no longer use it when I'm hunting alone. It's getting heavier every year to set up. I even went so far as to replace the straight pipe with heavy wall ABS, which worked well but didn't reduce the weight enough to really make a difference.
There are three things I always do to keep the tent comfortable.
The first is to throw a large plastic tarp over the tent and over the area in front of the door.
This helps to keep the heat in, when it's cold and keeps the canvas dry/mildew free when it comes time to pack it up. Much lighter as well. That canvas, can soak up a lot of water.
The next thing I do is throw down a ground sheet, usually a heavy poly tarp, to keep the ground moisture from evaporating into the tent and cots/sleeping bags.
Step number three, put down some old carpet on top of the ground sheet, especially beside the side of the cot you get out of to take a pee in the middle of the night. Good place to strategically position a pair of Crocs/slippers as well.
Putting a plastic tarp that's large enough to properly cover the tent and leave a decent size atrium in front, also gives a great DRY SPACE and a place to build an outside fire to sit around. The stove, inside the tent is better for hanging clothes around to dry.
Setting up a wall tent for only a couple of days, isn't what they were intended for and the set up/take down takes up a lot of valuable hunting/fishing time.
I find the wall tent handy, because I can fit it into the box on the back of my SXS quad, along with a pontoon boat and load the whole issue into the box on my old 93, 250 turbo, Dodge, with enough room left to load a game animal.
All of this means I don't have to hook up and drag a trailer, which is just something else to go wrong, when things go wrong.
I've tried the super light synthetic tents and don't like them much. Ok in the case of an emergency, but nothing beats canvas, if you don't have to carry it on your back.