We are planning to visit New York, Boston and Cape Cod in the autumn - late September/early October. We hope to spend 4 days in New York and divide the remaining days of our trip between Boston and Cape Cod. Is one day and one night enough to spend in Boston and 3 days adequate to travel Route 6A and maybe take in Martha's Vineyard also? We plan to take a train from New York to Boston and maybe ferry from Boston to Cape Cod. Is it possible to hire a car in Cape Cod? At this time of the year is it necessary to book our Cape Cod accommodation in advance? Any recommendation for any particular scenic town and accommodation would be greatly appreciated.