Have fun! I was there a couple weeks ago and had a blast. I don't know that they've had much snow since then, so you may have to do some venturing to find nice powder.
Not sure if you saw this, but here's my post from our venture to West.
http://www.snowmobilefanatics.com/forum/topic.asp?TOPIC_ID=60825
2006 Arctic Cat SnoPro 440/700 EFI
1998 Arctic Cat ZR 600 EFI Custom
1996 Ski-Doo FormulaIII 600
A mountain lion roaming the prairie found a bull, killed it and ate the entire bull. With a heavy belly, unable to walk, the lion laid in the tall grass moaning and roaring. Soon a hunter, attracted by the roaring, shot and killed the lion.
Moral: When you're full of bull, keep your mouth shut!