well the best deal in CO is in Denver so flying is out but if driving and haling out 1 or 2 any way they have 2 3 and 4 places to use.
http://extremesnowmobilerentals.com/rentals.html
single days are like 180 day but the week drops to like 120 day.
close off the interstate on the way up to the hills.
lots of riding choices.if you guys have a enclosed with heat or a pickup camper with heat or RV lots of guys stay in the parking lots and party all weekend or week what ever.
can be some good parties in some mack daddy toy haulers.
I think it is best to be Mobil and follow the champagne powder don't want to be locked in to 1 pass when 1hr away they just got hammered