I’ll chime in here.
This is something I’ve done extensively in the past, Not so much recently since I pretty much live on the river anyway.
I’ve used QF3, But upgraded to a XL4000T for space…I’m 6’6″ and can’t lay down in a QF3… I used a zero gravity chair to sleep in when in the QF3 and I use a cot now in the xl4000T.
My routine.
I sleep in my striker suit. No blankies…No sleeping bags…Just wear what I’d wear normally.
I use a cot. Small air mattress on cot. Heavy duty space blanket between cot and air mattress to reject cold air from below.
Safety is very important. I’ve nearly become a corpse from CO.
I put a fan in a door (no opening windows on XL4000T unfortunately). The fan blows air IN. You can let mother nature blow air in…but wind can change direction, and what’ll kill you is when the wind quits. Use that fan to blow air in to keep fresh air around you.
I run a sunflower, or double sunflower heater…all night.
CO2 detector hung in shanty.
I also light a candle.
When the rattle reel goes…my boots are already on…I just get the line.
I don’t use any kind of floor…never have.
One other important thing to mention that I do differently than most is to keep the heater off the ice. I am not a fan of the ice skating rink, or better yet pond that can form.
Therefore my sunflowers are always mounted to the top of the tank, even if it is the heater/cooker style….I clamp that baby on the top of the tank. Keeps the ice from melting…Common thing for people to bch about sunflower heaters…PICK THEM UP.
I always put a fan in the roof of the house blowing heat DOWN. Certainly helps warm up the shelter.
Do not be afraid to run excessive inflow of air…Just bring more heat. Thus the double sunflower.
Why insulated vs non-insulated…Condensation.
It is hard to sleep when your hub is raining on you 
Been there done that.
The insulated houses will cake with condensation (frozen) thoughout the night and you will have a thick heavy house to dry out when you get home. FYI… Insulated does accumulate moisture over time….It is just less likely to rain on you.
I cook on the heater/cooker/sunflowers…Something in tinfoil typically.
In the past, it would be a rare winter weekend that I wasn’t sleeping on the ice. Only time it has nearly killed me was prior to me using a fan to blow air IN, on a night when mille lacs when zero wind. Surprised I woke up when my sunflower quit running due to lack of o2.
