Thanks for the answer, which is similar to what I was reading.

I have changed the itinerary and probably will settle for:

3 days in Vegas,
Start of a road trip with Grand Canyon (South Rim)
than continuing by car to Death Valley, and through Sequoia, Yosemite to Napa Valley (at least 1-2 days drinking wines), than to San Francisco to see Alcatraz etc
than flight to LAX for beaches and Disneyworld
and back home to UK.

all in two weeks! Hawaii next time!