One of the most popular things to do for conferences is to rent houses together. You can do this through the conference mailing list – often one person finds the house, and then others come and fill it up.
You can also find further (albeit outdated in some places) details about lodging and how to get to Crested Butte, but if you’re in a hurry you can just call the Crested Butte Chamber of Commerce at (800) 545-4505 and they will help you make a reservation. Remember to ask for a reservation in the town of Crested Butte, and not on the mountain, in order to be close to the conference location. However, in the Summer there are always more rooms available on the mountain than in town, and the bus is very convenient to get from the mountain to town.
If you’re on a budget, try the hostel or ask the Chamber of Commerce about camping.
Here’s another site about travel, lodging and the Crested Butte experience.
Group Houses: Make sure you add yourself to the newsgroup for the conference. People often organize to rent an entire house for the conference, which can be more useful and fun. Once you’re on the newsgroup, feel free to make arrangements with other attendees to rent houses.