I'm from Sydney Australia and planning to come to the US for three weeks in December with my sister and parents. We want to do the west coast from San Francisco down to San Diego, then to Mexico for a couple of days, and fly to Hawaii for a couple of days on the way out. Is it best to drive down into Mexico, or to go with a tour group? Also, I'd really like to see Las Vegas, what do other people recommend? And would you drive there or fly..
Thanks so much