If you're staying South Shore, then Heavenly and Sierra at Tahoe are your best bets. Squaw Valley isn't too far away if you want to make the drive. Staying at any of the casinos is fine (Harrah's, Harvey's, Caesars).
Another thing you could do is stay in Tahoe City, lot closer to Squaw and Northstar and Alpine Meadows. Reno is between 35-50 minutes away. Believe me, after a day in the snow the last thing you want to do is drive someplace far.
Nice alternative is Homewood. Doesn't get as packed as the busy resorts and the view of the lake is incredible.