My husband has a business trip to Sacramento the first week in April, and my 15-year-old daughter and I need some ideas of things to do while he is working each day. We will rent a car, so we will be able to travel independently. We have been to San Francisco before and may spend one day there, and we are going to Lake Tahoe and Yosemite in conjunction to this trip. We would like to limit day trips to maybe within 100 miles or so of Sacramento. Any suggestions would be appreciated!