Regardless of what type of drive your have, it's best practice to run rear chains, and definitely not just front chains. This is due to how the differentials are set up and how the fronts turn when making turns, beyond just running in a straight line, like the rears.
I use the Aquiline MPC 'low profile' type chains on just my rear R4 tires. They give awesome traction, where I basically had none previously on my pretty steep 400' plus drive. These chains are a step up from ladder link chains, and a step below studded type chains. They allow for clearance on most CUT size tractors.
If you want to keep your tractor in good shape invest the money in a good set of rear chains and feel confident in the tractor's ability in most snow/ice situations. My 2 cents.