we will be arriving next saturday and leaving the following thursday. we will be staying in St Helena and are thinking about spending one day in sonoma since this is our second trip to Napa and didn't see any of sonoma last visit. Didn't know if driving there on Sunday would be a good idea since i'm sure with the time difference we will be up early, or if i should wait to go on monday or tuesday. I didn't know if the traffic would be better one day or the other. Of course the other suggestion would be to stop along the way from San Francisco Saturday, but that would be only half day at most by the time we arrive.