We are a family of 5 (3 grown up children} and have just returned from a great road trip to California. I got lots of tips from people on this forum before we went.
This was our itinerary if anyone is interested, lots of driving but worth it.
San Fransisco 3 nights
Yosemite 2 nights
Monterey 1 night
Santa Barbara 1 night
LA 3 nights
Vegas 3 nights