We are planning to drive the california coast for two weeks starting end of March. We have two boys ages 9 and 10. I am planning 3 days in San Fran then plan to head down the coast. I have no idea how long to stay in what areas. Is it too much to plan to get all the way to San Diego? We don't want to be on the go the whole time...i'd like 2-3 days in key locations...with sight seeing along the way. The boys would love surf lessons, whale watching and a day at Universal studios. Can someone help? i'm feeling very overwhelmed with the details. One final note...we are flying out of San fran...so we have to make this a loop!