The best travel options are flying into Denver, Eagle or directly to Aspen. Our contracted lodging properties all provide free shuttle service from the Aspen Airport. Snowmass is 5 hours from DIA and about an 1.5 hours from Eagle  
If you wish to use shuttle ground transportation, COLORADO MOUNTAIN EXPRESS is offering NAPSC participants a discount of 15% off their normal rates....
one way, or two way, door to door transportation is available from the Denver and Eagle airports....you may make a reservation on the web at http://www.ridecme.com or by calling them at (800) 525-6363 or 970-926-9800, but you must use the group code of "NAPSC8" for the discount.
Once at Snowmass, there is a free shuttle within the resort as well as bus service to Aspen and the other mountains.