Kirkwood is where you want to be man, here's why:
1) Nevermind the fact that Kirkwood gets the best and most snow out of all the Lake Tahoe resorts.
2) Heavenly is much more skiers friendly. Several trails are moguls infested, and there are plenty of flat grounds. But, it does have a breathtaking view of Lake Tahoe itself.
3) Northstar gets extremely crowded because of its close distance to the Bay Area.