I'm currently planning to take two or three weeks of vacation driving around in California this summer (starting in mid-August). My priorities at the moment are San Fransisco, Highway 1, LA/San Diego, and a detour to Vegas and Grand Canyon. I've also been thinking of a short (maximum one night stay) trip to Mexico, as well as visiting Yosemite and Death Valley, but I'm not sure wheter I will have enough time for this? People who knows California, how much do you think is reasonable to plan for without having to sit in the car the entire days? If you have any further tips about what could be worth seeing, or something else you think I should be aware of, I'd be glad to hear about it!