Buried bait set is another good one for deep snow trapping,agree with staying back aways from the dead pit for the flying scavenger's.

Adult ravins this time of year just like to pluck some fur and use it is aerial displays with their mates. They do return back to their nest with it and start lining it for their new season.
Fresh unfrozen coyotes seem to be a magnet. Learned that from a bird bander who would spend hours tracking to find nest
they know where the livers are and the fat reserves there.

Agree on the buried bait set-another one is a mound set.P-post too is good in winter for footholding canines.
I think your best producer would be to find their trails to and from your bait pile and slip a trap from the side under a track.They step in their old prints when on a trail in deeper snow.
Lots Of Mink(thats his handle) I believe posted of some good catches using that set,either on here or on the CNTA forum.

In many years trapping deep snow country in Northern Wisconsin I had my greatest success trapping trails as others have suggested. Locate coyote/fox trails crossing roads or snomo trails. Approach from the side behind a down log if possible. Slip trap under track as others have stated. Brush your trail as you back out. Due to near nightly snow falls, for checking from a distance, I would run a natural but unusual item such as a goldenrod stem with gall bulb through the chain and standing vertically in order to tell when the trap was gone.

The golden rod stem,I have used that method many times.

I have came in from the side of a trail before and dug in under a track and set under the hole in the snow I would not even cover the pan I doubt they could see down the hole. This worked were a yote was going to a deer that fell in a creek through thin ice moving snow is tricky to keep it from packing after the move.

Yup it worked for me

Sask Hunter have you had a chance to put out winter footholds around that dead pit?