We will be visiting California in a week or so and have a great trip planned from San Francisco to San Diego and then up to Las Vegas via Palm Springs. Our main area of concern is the route that we should then take from Las Vegas to Yosemite. There does not seem to be any direct route, is it advisable to stick to the highways or is it safe to cut across the country roads? Obviously the fuel stops are an unknown quantity ( don't fancy running out of petrol in the middle of death valley for instance).
Would be eternally grateful for any help on this matter.