I live up in PA and went to a farm auction last year. It was wet and rather muddy. They had 1 ton dodges driving around with the auctioneers in the back. The trucks were also duallys, but were sinking about halfway up the wheels. These trucks had chains front and rear and had NO problems moving though the muck and were barely if at all spinning the tires. This was with stock tires and with the diesel motor. Our mud might be a little thicker, but as far as they were sinking, i dont think they would have made it through without the chains. I mean, these trucks came to a complete stop for several minutes. Then began to drive on. So I wouldnt discount chains completely in the mud. As they spin, they grab more. They chains add more bite to the tire.

Dan