Chains make progress possible when "airing down", single tires, tread styles, fat tires, just make progress hopeful. Always use three railers on duals.
When installing on duals, fold the three railers in half long ways. Lay them across the outside dual, and fold them over onto the inside tire, with the center, in the middle of the tire. I have made a hook out of 3/8" round stock, triangle handle one end, hook on the other, about 3' long. Use it to reach between the duals to fish the end through, to hook up. The only way easier is to use a bottle jack and lift the axle. That is best. But it takes forethought. Which suggests that installation of chains is far more pleasant if you put them on before you have to dig down to the tires with a shovel. Its also far easier on the truck, if you chain up and just drive through the rough spots, rather then horsing the vehicle back and forth.
Lee in Alaska