You future CU kids may want to get involved with the ski and snowboard club. They help run the ski bus, which I don't think runs to Copper. They do run some other trips that are amazing. I just got back from spring break in Whistler, for $755. If you have any questions about the ski club, let me know.
It's pretty easy to find people to carpool with, regardless where you are going. People in the dorms who don't have cars are always looking for rides and will happily pay for gas, and others with cars who get tired of driving solo.