If you want to reach Weehawken, just take the Lincoln Tunnel from midtown Manhattan. Once you're on New Jersey soil you will be a few minutes away.
This area gets very cold in the winter with because of its proximity to the water and geographic location. If you decide to shoot here in the winter, bundle up!
An amazing image I was able to capture of New York City from a distance with the majestic towering of its buildings and the epic reflections on the Hudson River. Shot was taken on a cold night using a CP-l and a diffusion filter.