Well... you would have been good getting shuttle busses from the Reno casinos to all the Tahoe mountains. But in the middle of last winter they stopped running them midweek due to lack of ridership (or at least the Mt Rose one stopped running midweek.) The shuttles aren't really that cheap either.
Its sort of a pain in the ass to do this without a car. I did it last year when my license was suspended and basically rented a car for a day once or twice on huge powder days and risked being pulled over.
I'd just drive out if I were you. If you don't drive then I dunno...