In Northern California's Wine Country, they call December "Cabernet Season." There is some spin here, as December, among the coldest months of the year, is not the perfect time to visit Napa. But off-season means deals. Many hotels have special offers between November and March, including The Silverado, where Cabernet Season means 25 percent off the best available rate and two-for-one wine tastings. If you're flying, San Francisco is the best bet for reasonable fares.