We are travelling to America in May and want to drive from San Francisco via Yosemite National Park and Death Valley to Las Vagas. We will stay in Vagas for a couple of nights then we want to go to the Grand canyon and then back to Vagas before flying on to LA. We will be travelling with a 3 month old infant and so do not want to spend more then about 4 hours a day travelling. How long should we allow for this trip and do you have any tips on good routes and places to stay? Any and all information is greately accepted. Cheers.