I will be leaving San Francisco on a Friday and need to make it to Las Vegas by early Sunday evening. This gives me two nights and nearly three days to take in some scenery on the way. I would like to see some of the national parks but have no idea which one/s would be best to fit into the tight time frame. Can anyone give me some advice on which ones are a 'must see'. Names of parks and hotels, routes, and any other advice to a Brit with a lot to learn would be very welcome !!!! Thanks