This time of year, I'll take evenings over mornings.
When it gets very cold (single digits around here) the deer will yard up in pine and cedar thickets and come out in the evenings to feed. Get between the pines and the food and you could be in for a parade of venison.
Last weekend I was up in WI hunting a property I'm rather fond of. Five-below wind chill and 3-day-old snow on the ground. The best sign I saw in that woodlot was a single trail with four sets of tracks. No real late season food source there and the neighbors have several acres of pines bordering an alfalfa field. I left and went to check out another 5-acre piece of land I have permission for.
That spot was absolutely tore up with sign. It looked like a deer farm trampled the place. The sign got heavier and heavier the closer I got to the back of the woodlot. Once I hit the property line, it was easy to see why: a 5-acre standing sorghum across the fenceline.
I found a good spot about 60 yards inside the property line, set up my stand and within 15 minutes I was covered in deer and turkeys all afternoon. But three weeks of solid rifle hunting had them wound pretty tight, and I didn't have any real cover to work with. I must have gotten busted four or five times that afternoon, but what a fun time it was.
The next morning three deer came by within bow range and everything came together. I let a pair of button bucks and a doe fawn walk by, then took the big doe that was bringing up the rear.
Botton line this time of year: when there's heavy snow on the ground, if you don't have a good food source nearby, you've got a better chance of seeing a sasquatch than a whitetail.