I will be up there for 4 days over President's weekend, driving up 395 and staying at Carson Valley Inn in Minden to save $ and avoid crowds.
I plan to ski Mt. Rose Friday, Heavenly from Nevada base Saturday, Kirkwood Sunday, Mammoth on the way home Monday.
I have detailed resort guides for 4 major Tahoe areas at
http://bestsnow.net/insdtrak.htm .
If you're an expert skier, the major crowd issue at Squaw is traffic: get there very early. If there are intermediates in the group, avoid Squaw when it's busy.
Alpine's much busier now with the cheap tix, might want to avoid that on the weekend. Also shares Squaw's Hwy 89 traffic.
Marc would give Sugar Bowl a plug if you're on North Shore for a week. I would be inclined to agree, but you'll go through Squaw/Alpine (Hwy 89) or Northstar (Hwy 267, probably better) traffic to get there from Tahoe Vista.
Kirkwood is over an hour one way, but you should still do it once.
Homewood and Northstar are both sheltered intermediate mountains. Defintely go to one of them if you have a storm day. My Northstar report from Jan. 8-9 should be useful.
Diamond Peak and Mt. Rose are convenient to you. This will be my first time at Rose, but the buzz on the Chutes is pretty good. My guess is that Rose is now in the ballpark with Sugar Bowl for expert interest.
If you're up for a gourmet meal in Tahoe Vista, Le Petit Pier is excellent.