not to hijack the thread or anything, but my dad and I were planning a similar trip.  we were debating going to utah and jackson or colorado.
1) fly into slc, hit up some of the close by mountains for 3-4 days.  then drive up to jackson hole and stay with my aunt and ski there for 3 days.
2) fly into denver and drive out and do vail, aspen, breckenridge, crested butte, copper, and another mountain I forget.
What would be the better trip?