I have to disagree with chains only working on ice. Chains work quite nicely in deep snow too. I have lived here in VT my whole life and my dad has used chains for many years, all the snow plows use chains, and the school buses, not just when it is ice though. In the deep snow the tend to work as a paddle, but you can't keep them on if your running low psi, thats the down fall there. This past spring when I went snow wheeling with my friend, (
check out this little buggy
http://www.cardomain.com/id/mcgandystoys ) he had a hard time getting through the snow with his swampers cause they would just just dig him into the snow. My truck however did far better in the snow with my less aggressive mud tires. One thing I have definately learned is to pack trails. Just go a short distance and if you start to spin or sink, easy off the throttle and slowly back up a ways and then go at it again with a bit more speed, not much though. It is also very important to know when to give it more throttle and not too, can't explain it, just on of those things you'll figure out. I didn't air down my tires, just cause I had to drive home and didn't have access to a compressor, but my friend did in his sammy, I think about 8 or 10 psi.
Happy Wheeling
