Hi there, I'm planning a big trip for May/June 2012 and wonder if anyone can give me some advice on how to structure my trip. I'll be travelling from the UK and have 21 days. I want to spend 4 days in San Fran and then maybe another couple on the drive down to Los Angeles. Thinking of flying to LA and spending 3 or 4 days here, taking in an overnight trip to Grand Canyon. I also want to fly to Hawaii and spend around 8 days visiting a couple of the islands. However, not sure which way round I should approach the trip - start in LA or San Fran and whether anyone thinks it's just too ambitious for one trip?