Accommodations at Mammoth [1] run to luxurious ski condos with full kitchens, perfect for spending a week plying the slopes of the local mountains with family or friends.
Motels and inns offer comfort as well, often for a little less money and shorter minimum stays.
Links:
[1] http://www.moon.com/destinations/california/yosemite-and-the-eastern-sierra/mammoth-lakes