Im flying in from Philly to Yosemite or Vegas. We are looking to see the great parks in the area in a time frame of 7 to 8 daysin eary July. Should we start at the Yosemite park area and go toward Vegas and then the Grand Cayon or go in the other direction. Also is all this possible in this time frame? I notice other attractions like the ghost towns. Has anyone completed this adventure, if so any advice on or first West Coast voyage?