We took our trip up California into Portland last October - November.
I recommend:
Check out Flying Flags RV Park in Buelton next to Solvang. It's where the movie Sideways was filmed.
Be cautious picking your stay in the Bay Area. A lot of the RV parks are situated in areas overrun with transients and drug users.
In Petaluma be sure to go check out the Francis Ford Coppola Vineyard. I like to call it "Hogswarts for Winos"
If you go further north along 101 be sure you have enough gas to PASS Garberville. It's filled with more hippie beggars than the Bay Area. We couldn't figure out why until we watched "Murder Mountain" on Netflix. All the illegal marijuana growers have been hiding up there.
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