I bought the Clam Tie Down Straps for my Scout and Yukon, but after receiving them I wondered why I did it. It seems to me like (especially on the Scout) you could put a couple of ice anchors through the ice upwind and just hook the tow rope through them. With the Yukon, I would prefer setting it up with the back to the wind, and would need the Tie Down Strap Kit, since the tow rope comes off of the end of the sled, and the back of the sled would be to the wind with my setup.
Hope that helps,
-Jeff