I live and own two cattle ranches in Colorado. I own more than one truck, including one small utility truck on each ranch that is 4WD and almost never leaves the ranch.
None of our other trucks are 4WD. I use Dodge D3500 Commins Diesels, with dual wheels, for all of our trailer pulling, including our Montana 3750FL RV, horse trailers, stock trailers, flat-bed trailers and utility trailers.
For all of our trucks (except the semis) and also the autos, I change tires to winter tires with studs in the Fall and then back to summer tires in the Spring.
We have learned that even in Colorado, proper tires are the key for us, and even if we had 4WD trucks I still would put winter studded tires on every Fall.