We're planning a September honeymoon trip to the US and are looking for some tips/recommendations. At the moment we are planning on flying into Las Vegas, spend a couple of nights there before flying to San Fancisco for a couple of days. From here we're planning on a couple of vineyard trips before heading down highway one to Los Angeles and San Diego. Then we are planning on driving over to the grand canyon before heading back to Vegas.
We've got three weeks to make the trip, is this possible? Also are there any key sights to see on the way or make a detor to? I've seen that the interstate is the quickest way from San Diego, but would it be better to take a longer more seanic route and take in some sights along the way?
Any recommendations for sights, hotels etc would be much appriciated.