Sounds like a great trip. I'm in central Ca. There is wind and fog at the coast,the temps should be in the 70's and 80's, no rain. Fleece and something light to break the wind would be good. We only have earthquakes and wildland fires, so keeping the car gastank full of gasoline would be good. Some snacks and water in the car. PM me with your address and I'll be happy to send you the local tourist info. If you have any specific places you want to see, let me know.