Growing up in the mountains of MT I have driven many miles with chains on and put them on in many interesting situations. In an empty pickup, chaining the front will provide the most traction and also do the most damage to the front end components. Tie rod ends, CV joints, CV boots and ball joints take a bunch of abuse when bouncing and jerking around looking for traction on a 4X4 vehicle. When loaded with a camper I would chain the rear outside, if you have single chains or purchase a set of dual chains designed for dual wheels, as the heavier loaded axle will then have the best traction and put the least wear and tear on your vehicle. I have torn up a few front ends by chaining only the front of a 4X4 and never done it when chained all the way around, but make sure the chains are tight and check them often to keep them tight. I think the best advice when hauling the camper is stay home or pull in somewhere for a day or two until the storm is over the road has be plowed and sanded, besides I never need an excuse to spend a few more days camping!