My Wife and I went via car. My USAF bud who lives in New Palz NY and is a season tix holder took us. I do know the day before the game, we took a bus to Grand Central Station, to see NYC. There's all sorts of modes of transportation up there. It probably won't be hard to work something out.
On a side note....As a Rams fan, the Jets fans were pretty laid back towards me. Walking to the stadium from the car, I took a few friendly jabs but nothing harsh at all. Rams won that game 9 to 6. VERY dull game! The only big highlight was a BOOOOM punt by Hekker!