Also can anyone tell me which is closer/better to fly into? JFK or LaGuardia? We choose JFK but I think I can change it in time if JFK sucks or something.
LaGuardia is a little closer to the venue, but you should be fine either way.
JFK. It also allows you access to Airtrain to connect to the subway system/Jamaica station if you want to do other things in NY besides the conference.
But, either are good.