Definitely not my experience with the Wildpeaks. They slip and slide in the winter almost as bad as a K02. Have you ever used an actual good tire in winter conditions? Like a dedicated winter tire?
The fact that these have the 3 Peak Snow rating is laughable and just goes to show what a load of shit that rating is. Probably great for Arizona/Texas snow falls, otherwise it looks like another brodozer tread pattern with not enough sipes.
This isn't really great advice, using off-road mode locks the diff and turns off traction control. With a locked diff, your truck it far more likely to get sideways or lose control. Should never drive for extended periods with the diff locked