One other question, Kevin, did you try the various Drive Modes available on the 10 speed transmission - On the shift knob to the drivers right, under the knob is a push button labled DM, and pressing it allows the choice of several drive modes which are displayed in the dash board - Normal Mode, Tow-Haul mode, Wet Rain or Snow mode, ECO-mode and Sport Mode. These modes shift the trans shifting curves and make fairly dramatic changes in the performance of the truck...
While driving to Denver last January in heavy snowfall I began to feel my rear wheels break loose from the asphalt and slip ~15º sideways - countersteering brought that back under control, but switching to Wet Rain or Snow Drive Mode and it no longer occurred. Maybe the snow was lesser ( it was ) but I think it really helped. When I was drivng to Dallas in absolutely torrential rains in March ( the kind of rain one should really pull off the road for), I had no issues with hydroplaning in Wet Rain Snow Mode. So I am a fan of the transmission and the Drive Modes.
Tow Haul will help you get off the line faster with a heavy load, and I expect it to offer better speeed control when descending mountain roads with a trailer as well.
My truck came with Hankook DynaPro AT tires with a M+S ( mud and snow ) rating so that may have helped. They are quiet on the highway but seem adequate in the snow I encountered.
You can also manually shift the transmission gear by gear with the +/- knob on the gear shift lever too. And the rear dif locks electrically in the FX4 package.
Your truck was white - a great choice for a desert truck - mine's white too. Not quite so a great a color in a blizzard perhaps....... 🥺