Hi Stephen,
That sounds like a decent plan ! Here are some links to some of our favorite threads in the West. You will find many more by using the search button but to give you a start a very popular and incredibly scenic and diverse route would look something like this LA > Grand canyon > Vegas > Death valley > Yosemite [via Tioga pass] > San Francisco > LA taking a couple of nights down the amazing Pacific coast highway. That would be well suited to an 11 day trip to get an overview of these great locations.So now I’m planning to hire a car from LA airport and return same place. Now I need to find out what’s there to see,