Our question about marina availability was really directed at long term - say 2-6 months storage of the boat. Storage could be in the water or out.
Now that you mention it though availablity of slips and moorings on an overnight basis in the Sept., Oct., Nov. time frame is also a good question. It kind of takes the fun out of it if you have to be making berthing arrangments 3 or 4 days ahead because all the marinas are so busy.
We would plan to anchor as much as is feasible but the old personal and boat washdown at a slip becomes attractive after a few days on the hook.