I'm doing my homework for a ski/snowboard road trip sometime in the
end of Dec or first week of Jan. We'll be heading east out of Seattle
(WY, MO, ID, CO, UT). We have about a week, maybe a little more.

Basically, I'd like to solicit some suggestions for mountains worth
visiting, and maybe also general sites/places that are "must see"
this time of the year. So far, Silver and Jackson Hole are on my
"must go" list. We have a strong preference for less mainstream
mountains with more locals on them and less tourist crowds. Also
advanced terrain and quality of snow are of great interest. We'll
have only one or two people who are intermediate level, everyone
else advanced.

We'll probably want to visit either Denver or SLC and stay there for
half a day, but other than that any route would be good.

Thanks in advance!