The only chains we use are on my backhoe or loader. Even when I owned truck companies, if it was so bad you needed chains, I bought a motel room for my guys until it passed. There is no Ski trip or anything else worth putting people at risk in extreme weather. I have lots of 4 and 6 wheel drive vehicles. If they are not adaquate for the job.....it doesn't need done. I used my TD6 dozer to clear my 1/4 mile driveway last year for the first time, not a lot of drama when you are properly prepared. Chains can and do a tremendous amount of damage on vehicles in the winter. Inevitably a link or cable comes loose and beats the devil out of a fender or more. We must have repaired a dozen of them in my body shop last year. Big trucks or even smaller flatbeds are ok and simpler to install chains, have less chance of damage. A few rules we developed in years of trucking and traveling over the world. Always avoid getting caught at night on a bad road and if chain restrictions are up, shut it down. Off course, the most dangerous is ice, particularly unexpected black ice that you find yourself on. Studs can help there but sometimes you are just screwed.