In the US, the snow is superior in the Rocky Mountains to the Sierra Nevada. It is generally too warm in the west for really good snow. New Mexico and Utah have that really dry, powdery snow that is nice when you get back in the trees. Taos, NM is pretty amazing. Nothing withing hundreds of miles but Santa Fe, if you are interested in apres ski activities.
Tahoe can be crowded, but is really not bad in midweek, it does get ugly on the weekends, or it can. If I were going to take a week, I would get a 5 day pass and ski Monday through Friday. Do NOT go on a holiday or between Christmas and New Year's Eve. Squaw Valley built this resort in the last few years that is very not bad. I don't care for gambling myself, and would be inclined to go see the car collection in Reno on Saturday, maybe just drive around the Lake on Sunday, or do a little cross country rather than alpine skiing
You like cars, right?
:: National Automobile Museum | Reno, Nevada ::