MIke and Sue wrote:
Thank you all.
...
If we decided to pick up the RV at New Haven, would we find a camp ground close enough in to Boston to allow us to explore the city using public transport - or would we be better exploring Boston first and then picking up an RV?
IMHO you would be better off to explore Boston first and then get the RV. I suspect the extra rental costs plus campground costs would be no less than a reasonable hotel, and a hotel would be more convenient. It's not as though you'd be using your rental for much more than a hotel room anyway.