I have had some great adventures shooting in the snow. I use to go with my brothers, brother in law, and some friends to an old farm way back in the Catskills behind Hunter mountain. We once went up in late Feb drove as far as we could and hiked a couple miles to get to where the property was. There was two feet of snow and we camped out. Cooked out on the fire, steaks, hot dogs, tin foil wrapped potato's with all the makings. At night we played cards told dirty jokes, and cleaned our guns. During the day we shot long guns at plywood targets most were percussion I had a flint plains rifle I made. although we had tents and sleeping bags and sleeping mats, with the accumulating snow, fire and long guns it had the feeling of being "primitive". It snowed all weekend and we had a couple mile hike out to the trucks but it was great fun. That was near 40 years ago and unfortunately we had no camera so no pictures.
Oh, and I almost forgot to mention, everyone there back then seemed to have their own slightly different way of keeping their rifles clean and rust free.
Rob