Cool! I grew up in Saskatchewan and likely going to move back there around new year, I'll just miss you!
I work in construction and I was told that your first winter working (or hunting) in extreme temps is your worst, no matter how warm or cold that winter is relative to the averages. It is True! The human body can aclimate to some pretty crazy weather!
Wool and Polar fleece(berber fleece) do wick moisture somewhat so that is a plus, However they let the wind through like a sieve! and Believe me there's usually some wind in SK. Although North of Yorkton there's likely a bit more trees to break up the wind. I like fleece/wool type layers close to my body, and carry in a heavy jacket/windbreaker to put on a few minutes after I sit down. You will need half the clothing when walking so make sure you have a way to avoid overheating while walking otherwise if you begin to sweat while walking in you will be cold in no time flat.
Last fall my brother and I were sitting out in -30C with light winds for up to 4 hours before needing to move and warm up a bit, we were wearing longs, a couple layers of fleece, and Helly Hansen construction gear the fleece lined anti-tear wind proof outer shell. It gets noisy when cold so we put a layer of fleece or sweat pants over to kill noise if we want to move around.
A cheap way to layer up is a sleeping bag from a second hand store!
For gloves I use a light knit type glove with rubber bumps on the palms and giant leather fleece mitts over. Once I'm settled in my place I lay the gun on my lap, shooting stick handy and take my trigger hand mostly out of the mitt or even in my armpit.
You can also tense your muscles while sitting without making drastic movements, this can help keep you a bit warmer.
Footwear again we use our construction boots, Dunlop winter work boots, and a couple layers wool socks.
Lens caps are always a good idea but it's usually too cold for the blowing snow to actually stick to your gun or glass, however make sure to avoid breathing on your lenses before you shoot, they will fog up just like your glasses would except the fog freezes instantly and good luck trying to get a clear view! Ask me how I know!
Enjoy your Hunt and make sure to post pics of your deer!
P.S. don't talk football unless you like the Riders! SK people are fond of their team! I'm not much for sports myself however.
