I am 41 years old and just met my biological mom in April. She and her husband are coming to California to stay with me for a few days and then we are going to take a road trip from L.A. to Somona/Napa area. I only have four days for the trip - renting a car up and will fly back and they are leaving out of SF airport. I know we want to spend a couple of days in the Sonoma/Napa area but need suggestions on where to stop along the way - we will only be stopping for one night. I know it is not much time so want to know what should we not miss. They are coming from Canada! A special trip so would appreciate special advice! Thanks much!