I wouldn't ditch the morning hunts completely...
If you get a good amount of snow, and it snows for several hours, typically that first hour or two after the snow can be just as hot...
As mentioned above, focus on the food sources, corn, beans, sugar beets, whatever is available.
I typically don't hunt late season, typically too cold, and long long hours on the stand with minimal deer sightings, however, some good deer can still be shot.
If you can't hunt directly over one of those food sources, hunt trails leading to them, or trails from bedding areas.
Depending on your gun hunting pressure around the area, and how quickly deer rebound from being shot at constantly, I would even consider still hunting with a bow.
A lot of times, those deer will be bedded down from dawn to dusk and only move at night.
It's good for the soul when there's not a soul in sight.