The places we've been as a 2-family ski vacation are (in chronological order)
My wifes favorite was Tremblant (walkable village, French influence) followed by Heavenly (walkable town, stuff to see around the lake, paddleboat trip).
I was surprised she didn't like Park City better, but the surrounding area is pretty urban. Park City itself is cute, but it is mostly high end (ridiculously expensive luxury shops) and low end (T-shirts) with little middle ground. It is also on a fairly substantial grade, which makes strolling around less fun.
At Tahoe we stayed in the Embassy Suites (not a casino) about a block from the Heavenly gondola. There is a nice variety of stores, restaurants, bars along the street there with wide, level sidewalks. (We made one effort to enjoy the casinos, but gave up after 1/2 hour and $50.) It's a short drive to the lake. The non-mountain countryside around Tahoe is generally prettier than in Utah (subjective, I know).
I'm currently trying to organize the Feb 07 trip, and one of the options I'm thinking of pushing is another part of Tahoe, probably Squaw. (Breckenridge is also on my short list).
So I am interested in what there is at Squaw. How substantial is the village there? It looks interesting from what I've seen on-line. Also, does anyone know how much ski in/out or walk-to-lift lodging there is at Squaw? The one quote we got was so expensive it was funny ($10,000 for a week) which probably just means we asked the wrong agent, but might mean there is a severe shortage of convenient lodging.