Chains make a world of difference UP Guy. My clearing is mainly on inclines and I would have a tough time pulling the blower without them.
My DK35 has tight clearances so it made fitting chains difficult. I started with DUO's and found the gaps between the patterns too large. So I modified them as shown in this thread:
http://www.tractorbynet.com/forums/attachments/268885-duo-chains-planned-modifications.html
and am happy with them now. If doing it again I would likely go with Aquiline, Trygg or Tellesfdals that have a continuous pattern around the tire's diameter.
I used small chains for the fronts.
I think most will agree that chains dramatically increase traction..
If your are interested you may want to start a thread asking for opinions for your tractor and tires. I found it took a lot of testing and adjusting to get something to work. My dealer quit selling chains because they are so difficult to fit for everyone. He now directs the customers to a local supplier.
Cheers