In keeping with the theme that Tahoe conditions can be unpredictable, please pay attention to the point others have made about being able and ready to go to another resort. I travel to Heavenly from Texas once a year with my buddies (intermediate to just above level snowboarders) and once a year with my family. Usually, I go with the guys in mid-December or mid-March, and I take my family over the Holidays or Spring Break.
The best part of Stateline/South Lake Tahoe (other than the incredible beauty of the lake and high desert, especially as seen from the top of the mountain) is the ease of the experience: there are tons of food options from food courts in the casinos to a variety of high end food. The Stateline Brewery (in the basement of the shopping center between the Embassy Suites and the Marriott) is a good place to go: Good beer and food options, regardless of the size or character of my party and, again, an easy experience. If you want to impress your ladies, the view from Friday Station steak house (atop the Harrah's casino) is unbeatable. However, keep in mind that it gets dark early in the mountains and the sun will be down around 4:40-4:45 during the time you are there, so eat early if you go there as you want your money's worth and, though the food is good, you are paying for the sunset and alpenglow.
So, you gather that I love Tahoe, BUT the one inescapable and often trip-busting phenomenon is the immense wind that sweeps across the Sierres OFTEN. I would say that, in the 50+ days I have dedicated to riding in the Tahoe area over the years, fully 1/3 have been "wind hold" days where some or all of Heavenly (and other resorts) are affected by winds that I have seen exceed 100 mph over the ridgelines (though, usually, the wind hold is in the 30's-40's). Heavenly has the advantage of height and, as a result, when snow conditions are weak, Heavenly is making enough snow to enjoy yourself. But, Heavenly's height also makes it the most susceptible to these wind holds. When this happens, if you want to stay close to South Lake Tahoe, head south to Sierra at Tahoe (a smaller place with a decidely "relaxed" vibe) or, as I prefer, go to Kirkwood (more of a traditional ski resort set up, but the mountain is protected like Sierra at Tahoe and there is more of it and better runs).
Anyway, have fun and best of luck to us all: I will be there Dec. 28-Jan. 2 with my family. Cross your fingers.