The very low tour package airfares are usually only available for the upcoming two or three weeks. I d recommend getting airfare only through the tour group and then booking a ski package directly with one of the casinos in Lake Tahoe. Kids also stay free. I recommend staying on the south shore of Lake Tahoe, which is divided into South Lake Tahoe, California, and Stateline, Nevada. Heavenly Ski Resort is a huge mountain and the lifts are literally only about a 5 minute shuttle bus ride from the casinos.
Heavenly buses circulate continuously between the south shore casinos and the lifts.
The north shore resorts are about 45-80 minutes away depending on weather and road conditions. If you fly into Reno, take the convenient Tahoe Casino Express to the south shore. The buses are very nice and clean and the buses depart right by the exit from the baggage claim area. The ticket counter for the Tahoe Casino Express is also right next to baggage claim and buses conveniently run throughout the day and night. For more information on Lake Tahoe, check out the Black Bear Inn link near the bottom of this page.