I don't know offhand where China Cove is, but Paradise Cove, off the east side of the Tiburon Peninsula, is subject to large, unexpected wakes from passing cargo and tanker ships because it is so close to the shipping lane. I would advise battening down everything before settling in there for the night.
Richardson Bay, off Sausalito, is a much more popular anchorage. By the time large ship wakes get there, they've travelled 4 miles or more so they've lost much of their punch.
BTG