thank you sir, karma added.
While I agree with your post...
I just had the exact same question and after tearing up Vail Pass on a sled/snowmobile/snowmachine(respectively) for 8 hours I determined that ski boots work just fine....however the rails tore my boots up. I was just going to say...as long as you put down those rubber mats you should be fine....but I am not sure how the plastic ski boot will grip to snow covered rubber. Backcountry sledding with a 154 inch paddle track was just a tad bit more fun than riding Michigan's bumpy ass trails. Be safe tho, bring a local and a beacon.