If there is any snow in the forecast for the days you'll be driving, I would def. go with a 4wd SUV. 95% of the time the chain control sign reads "Chains Required - 4x4 w/ Snow Tires ok". Basically if you are driving a 4x4 the guy will shine a flashlight on your tires and as long as they have tread, they will let you through. However, Mt. Rose Highway (which is what you will take from Reno if you are going to the North Shore) may have tighter restrictions from time to time if it is really dumping. I think that would be a rare scenario, especially for early Dec.
Here is a good site for Tahoe weather forecasts: Tahoe Weather Discussion - No Hype Lake Tahoe Weather
. This guy is pretty accurate, and unfortunately right now he is predicting a late start for the winter, an early finish, but a good bit of snow Jan-Mar.