Pros and cons of Northstar
Its in Tahoe
Relatively flat terrain
Tons of beginners everywhere
20 minute walk from parking lot to gondola, then another 10 minute just to get on a chairlift
Weekends are a no go, unless you want to wait in lift lines for 15 minutes
Gets boring quick
If you go to Northstar you have to get a pass somewhere else as well like Squaw or Alpine, otherwise you'll hate yourself for it. Northstar is a sick place to go during the week for some park shredding, but if you want to do any real skiing its not the place at all.
If you're going to come to Tahoe just forget about Northstar altogether, buy a pass to Squaw and one to Boreal.