If you want to take advantage of the snow season (weather depending), NorthStar is close by and offers skiing, snowboarding, and other fun winter activities.
If you want to get a view of the lake, bring a picnic or just walk along the water this is a great spot. Dogs welcome!
Downtown Truckee is quaint, with restaurants and shops that are easily walkable.
Since Nevada is close by and you are into gambling, the Hyatt is about 20 minutes from the Ritz and offers a casino and other amenities.