Since no one else has mentioned it, Kirkwood deserves your attention on this trip. They implemented high angle grooming with winch cats this year, and the results on that terrain are spectacular. If there is a drawback, it is that there is only one high speed quad (cornice express) at this point. Kirkwood offers great alpine views of the Mukolumne wilderness, a compact ski village, and the best snow in the Sierras. Accomodations at the ski area, in Gardnerville NV and is accessible in less than 30 minutes out of South Lake Tahoe or 15 minutes from Sorensens Resort in Markleyville (family cabins along Hwy 89 in Hope Valley).
In the South Lake Tahoe area, Sierra at Tahoe is another nice place that offers nice steep groomed conditions. No village here, just a lodge, but great skier's area. Avoid weekends if possible. SAT and Homewood are best bets for a storm day when Heavenly, Kirkwood, Squaw and Alpine are likely to be on wind hold. If its storming, avoid Heavenly all together. Without the view, and with the upper mountain on wind hold, there is nothing here, move along.
Heavenly has taken quite a beating in several threads. It can be a good cruising mountain. The area is probably best seen as 5 or 6 separate ski areas joined by traverses:
1 The Face, Hogsback and Gunbarrel;
2 Sky Express, Canyon Express and Powderhorn Express;
3 Comet and Dipper (avoid Galaxy area);
4. Mott Killebrew Canyons;
5. Stagecoach, North Bowl, Olympic;
6 The Gondola and Tamerack just connect between CA and NV
Once you know how to move around, the place is OK, and the traverses discourage snowboarders. If its a crowded day, there will be almost no one on North Bowl and Olympic (slow chairs). There are some good tree runs in those areas as well that take longer to track out. As you can see, this area is cut up and much criticism of Heavenly comes from those that only ski a fraction of the area and never have seen the whole place. If you ski off-piste, you will begin to see where some of the claimed 4800 acres comes from, but truth is, you would have to climb to the top of Monument Peak which their maps show as inbounds.
Anyway, I ski all three areas quite a bit and am rarely bored. Hope you have a great trip.