For a memorable weekend in Northern California you can visit a six-acre hillside blanketed with 4,000 daffodils take a stagecoach ride or pan for gold in an old mining town enjoy the pie-eating contest and other entertainment at a pumpkin festival celebrate a Victorian Christmas at a cozy landmark inn.??Or you can hike, sail, museum-hop, tour the wine country, go whale watching, or relax at a well-known spa. Eleanor Berman offers hundreds of ideas...