Would like to do a trip to California in September and try to drive from LA to San Francisco (scenic highway), and perhaps spend a little time in San Francisco. In addition, we'd like to go back to Hawaii (anniversary) and spend time on the Big Island or a different island. How much time is suggested? 10 days California, 6-7 days Hawaii? We are just going to do some basic sight seeing/tourist attractions in California.
Thanks in advance.