Skeedoo, that's awesome, thanks for posting. I rode in the San Juan Mts. back in December and I think back to that trip every day still. Seeing your pics brings back memories and makes the steep and deep itch even worse!
prowrench, you can definetly do the Mts. on your 121, you will however be limited, just dont drop off below the trail.
Polarisman- I did it alone last December and with a little reasearch, a couple phone calls and emails to dealers, snowmobile clubs, and the local US forest service office I was able to have a great time. On my last day I hooked up with a couple locals trailside who even guided us around a little bit.