Calgary winters are hard to predict.
There will be snow & ice, but nobody knows when, or how long it will last.
I used to have a Subaru WRX (all-wheel drive) and it was terrible on ice until I put on winter tires.
I never bothered with snow tires on the Chevy Avalanche, all-season radials & 4-wheel drive worked fine even in really nasty conditions. Really good traction control on that vehicle.
Now we have a Chev Traverse, still all-wheel drive, and early snows indicate it won't be all that the Avalanche was.
So it's somewhat vehicle dependent.

As to the OP; we have a BIG duffle of winter gear that gets tossed into the car if going out of town. Snow shovel, candles, food, tuques, gloves, stove/pot, etc, etc.

At the house the generator gets checked over & that's about it.