We are a family of 4 from Sydney and will be in the US from Mid-September until Mid October. The first part of our trip will be on the East Coast but we then fly to Phoenix to to do the Southern end of Grand Canyon, and then on to LV. We then were wanting to drive through to SF via Yosemite and Napa Valley, taking 4 days (3 nights). Which would be the most scenic route (would the route over the Tioga Pass take too long ). ? Where would you suggest we stop over the 3 nights?