Looks like a hotel group rate has already been established for at least Thur through Sat nights (8/2-8/5). If you call the Embassy Suites by Hilton San Rafael Marin County (415-499-9222), select the option for a New Reservation, and then say you're with Shelby American Automobile Club, they offered $215+tax per night. On their website, the lowest I found was the AAA rate at $275/nt, so that's a decent discount. This is for a king bed room with a fold-out sofa. They offer a full-refund cancellation policy up to 2 days before check-in.