It depends on what your definition of "in the snow is" . If you are talking about driving the truck on a warm paved road (road temperature around 32F) with a half inch of snow, then I agree, it is not good. You can lower the tire pressure or put chains on and slow way down. Most tires are not good under those conditions. I use Nokian Hakkapeliitta studded winter tires on all my cars and light trucks. They are by far the best I have found in winter conditions. Sadly, they do not make them in 395-85-20.
If you are talking about an unplowed road or driving off-road in deep snow then my experience has been the truck is amazing. I have driven in some very deep snow, up to 36" of old corn snow (like little ice balls similar to very loose beach sand), over snow banks and snow piles. I have pulled large whole trees through deep snow up a slight grade without the slightest problem. All of this done when the temperature was well below freezing. (as cold as -30F) When you get close to 32F you will begin to have traction problems as the snow will glaze to ice under your tires. That is when the chains would help a lot. I do use CTIS to lower the tire pressure to the OFF ROAD setting. I do not even own chains for the LMTV, but I do have the factory installed self recovery winch. I use the winch often, but not for self recovery yet.
If you add weight on the truck to improve traction I would start with a ton and put it right in the very back of the bed because the front axle carries most of the weight of the truck when empty.
If I have to drive on snowy plowed roads I would never choose to take my LMTV over any of my other vehicles with studded snow tires. If i have to drive off road or on unplowed roads I'll take the LMTV every time.
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Last December, we had a surprise snow storm. It was a surprise because we were supposed to get a foot of snow in the predawn hours and ending in the early morning. A quick foot of snow. But they were wrong, the storm began and ended as it was predicted but we got 3 and a half feet! It was snowing 6 or 7 inches and hour for 5 hours! The photo was taken after the snow had settled down quite a bit. It was over the headlights before settling down. The ground was completely bare before this storm so you are looking at 1 snowfall in this photo. I was too busy moving snow and pulling stuck vehicles with my skid-steer to have time to take my truck out in this storm but I am sure it would have done just fine. It was a cold storm. The air temperature was below 20F.