Looking at the cats in snowcat alley, it appears that if you get loads of light fluffy snow, Thiokol (or its decendents) is the way to go. At least for the snow cats normal folks can afford. There is one Bombi in there right?
Hey, while Kristi's have a track pressure about .5 psi - in a deep dump of light fluffy stuff, say like 10 feet of Alta fluff, would a Kristi float enough to be able to see above the snow surface? They are not very tall.