No debate. ALWAYS chain up the front end of a 4x4 if you only chain one axle. It's like a front wheel drive car---pulls like crazy and steer too. Just moving forward does not help if your front end drifts out or slides downhill, and steering while stopping hard without front chains is equal parts of hope and prayer. With front chains you just keep it straight. If the rear end starts to come around anytime you simply steer into it and bump the throttle to snap the vehicle into line. Chains on all 4 works magic, but it is only needed in the most severe conditions on deep unplowed roads, cross country offroad travel, super steep areas, etc. A single set on the front will work great for any travel on the highways, and 99% of everywhere else.
VERY IMPORTANT!!! When I talk about chains, I mean CHAINS! Cables provide only a small increase in traction, just enough to get people moving at times. Reinforced v-bar chains are the only way to go. They have at least double the traction of cables, probably a lot more. They will also stand up to tremendous use and abuse. I have 25 year old chains with thousands of miles on them, including lots of offroad mud, rocks, etc on heavy 3/4 and 1-ton trucks that are still going strong. Only the v-bars are wearing. Staight link chains come in second.
If you are going to be in snow country a lot it is worth your time to find a snowy area you can't hurt, and that won't hurt you, and try them out. An hour of starts, stops, and turns in an empty parking lot will teach you much about your rig's handling. If you only pass through occasionally you still want to practice installing them in your driveway, and make sure that the chains will work on your truck while turning, etc. Some vehicles do not have enough fender clearance to run chains! (Should be illegal..)
Last tidbit. Installation is quick and easy the trucker way. 1) Lay out the chains and untangle 2) Drape over the tires with one end tucked under the tire and the other end in a pile on the other side. Be sure the v-bars are out, and that the inner catch is to the inside. 3) Move the vehicle a few inches so it just runs over the tucked side, with a few inches sticking out. The other end should be dangling just above. 4) Hook up the ends and apply tighteners. For the fronts I like to back up, so the connections are made at the front of the tire, for easy access.
MM