Sorry I don't know about the ones in NorCal, but Sunday Dec 12th, I am riding in the one in Bakersfield and they expect 4000 motorcycles. If you can make it, the event starts at Beach Park at Oak and Rosedale. The ride winds through downtown streets to the fairgrounds where they have food and entertainment. Cost is $20 toys or $20 canned food or $20 cash. Get to the park between 7am and 10am. Coffee and donuts, pins and t shirts at the park.