I am off for 8 nights in the US from 1st August. Flying out into JFK for 4 nights in the big apple then planning to head off upstate to Boston, via Martha's Vineyard. Will seek to take a car from NY city with drop off back at JFK. I know there are lots of US road trip threads, but specifically, what do people suggest for car hire from NY. Not seeking anything flash, just pointers I might have missed on deals and don't forgets.