I can't visualize the scenario you seem to fear: 4wd and chains on the front (wisely, IMHO) for engine braking ...so, how do the rears lose traction? either by using the brakes, locking the rears, and having gravity/momentum make the rear slide ...so, get off the brakes and let your engine-braked-chained-fronts handle the stopping. What is normally observed in cars when the rears lock (or spin) is loss of traction and then the road camber causes the car to slide into the ditch. But in your case, get off the brakes, and power applied to the chained-fronts can pull you straight, as it were, ...or anywhere you steer ...think "front-wheel-drive" ...you just have to overcome the polar moment ...which is what front-wheel-drive does ...that's why front-wheel-drive cars "push" in a curve and it is actually hard to make the tail come around (which you would do in a rear-wheel-drive car by blipping the throttle ...i.e., spinning the rears momentarily to break traction and induce rear-wheel slide (then, of course, back off the throttle and accelerate within the adhesion limits of the rear tires)
As for the OP, knowing the various tricks for chaining up means that you never have to lift 80 pounds ...you might have to drag 80 pounds to line them up, but (if you have open wheels) you can let the tractor bring the chains over the wheel. And, once mine are on, they stay on for the winter ...so, even if you brought in a helper once a year, you'd be on top of things.