Y'know, I'm kinda flabbergasted - I know there are numerous scannists in the NNJ/NYC areas, and yet on both the NNJ-Scan and ScanCom Yahoo groups, I can't think of more than a handful of mil air loggings.
Anyway, to start, I'd take a look at the Where to Start topic of:
http://wiki.radioreference.com/index.php/Milcom_Web_Pages_and_Mailing_Lists
The NY ARTCC should be an obvious target.
Unfortunately I see that the pages on the RRDB are pretty threadbare for the 3 big airports - LaGuardia, JFK and Newark, but I guess they'll do for a start.
I'd also join the Milcom group on qth.net (that link is in the Mailing lists topic), and it probably wouldn't hurt to join up on NNJ-Scan and ScanCom on Yahoo groups, either.
73s and good hunting...Mike
[edit] I see the well known Charlie Hargrove site has the Airnav links for the various airports mapped at:
http://www.n2nov.net/nycaero.html
It doesn't look like it's been updated in a while, tho.
I don't know of the 177th out of Atlantic City flies North - probably does - but our Wiki page has freqs we've noted for them when they fly south toward the DC Maryland area - it might at least give you a starting point...
http://wiki.radioreference.com/index.php/NJ_ANG_177th_Fighter_Wing