One of the BEST road courses in the whole country was out in Bridgehampton. Great circuit with; phenomenal scenery, nice sweepers, some long straights, and even elevation changes!
But, like soooo many tracks (of ALL kinds) these days it fell victim to noise regulations by those who chose to encroach on the track and decide to live close by (also inspired by and egged on by VERY greedy land developers/contractors).
Now, yes, the closest to you would be either Lime Rock Park in northwest Connecticut, Pocono International in central Poconos, or the afforementioned N.J. Motorsports Park in SOUTH Jersey.
There is a private, 'motorsports-country club' type facility in Monticello (Monticello Motor Club), but I am not sure if you must be an uppity, high zoot, (and obviously VERY wealthy/monied) member in order to use the circuit, or if it is available to clubs/orgs to hold HPDEs/open tracking/lapping days, etc.