In May 2010 my family is travelling to California for 3 weeks. We are spending 5 days in LA, then 3 days in San Diego, then travelling to Grand Canyon for 2 days, then Las Vegas for 2 days. From here I have 8 days to get to San Francisco. I don't want to go via the Coast, because I'll be doing this route from San Francisco back to LA. I'd like to see some of the National Parks. I'm completely lost as to what to see, which route to take, what roads will be closed at that time of year etc. We are renting a car for this entire trip. Would really appreciate some advise and tips on this proposed itinerary. Thanks.