I would really appreciate some help for a planned trip in April 2010 to celebrate my daughter's 21st birthday. Four of us will travel from the UK (all adults). My daughter wants Vegas and shopping! We also want to include the Grand Canyon (maybe a flight), Yosemite and a drive down the California coast - and all in two weeks. Can it be done without killing ourselves? All ideas welcomed. Where should we stay in Grand Canyon and Yosemite? Any chance of white water rafting en route? Where is best place to start and finish?