Alpine Express Airport Shuttle
NOTE: Reservations MUST be made in advance.
Private transportation; The have two 4WD Chevy Suburban will each hold six passengers plus luggage. Will stop at stores in Gunnison for groceries etc. Round trip is $245 regardless of number of passengers (significantly cheaper than Alpine Express if you get 6 people!).
They can pick up from any airport in Colorado, including Montrose ($450 round trip, regardless of number of passengers) or Denver (1080$ round trip, ditto).
They also pick up and deliver groceries from Gunnison: 79$ to shop and deliver.
If you're going very low-budget, you can take the RTD bus which runs between Gunnison and Crested Butte. Definitely less convenient than the shuttle; you have to walk for a few blocks with your bags and then wait for it. Bruce recommends the shuttle.