I'm driving the west coast this May with a friend and will have around 2 weeks and a half to 3 weeks maximum. The idea is to drive all the way down to San Diego and then drive to Las Vegas where we will fly out back to London UK. Should I start in Seattle or skip and start from San Francisco? Have you done this trip from Seattle? Is it worth it? Is it realistic to do the whole thing in 3 weeks max? I note that I do want to go to Disney/Universal. :) Adding Yosemite for 2 days, realistic on this timeframe?