Thanks for the information Hiker!

On a kind of related point; a group of us slowshoed/skied out to kwai lake this weekend and met 3 dudes who were hoping to get out to Sid's cabin. They left an hour before us; two were wearing jeans and steel toed boots, one was in sweat pants and old tennis shoes.

We caught up to them at the ranger cabin where we found them soaking wet, horribly tired from postholing the entire way in to that point and amazed at how comfortable we were.

Crazy.