When we go out of NY we also park in weehawken and take the ferry.As you come across the river you can see the ship.We walk to the ship from the ferry.[have wheels on our bags]It will take about a 10 - 15 min walk.When we went on the Dawn in Nov.,the ship was docked next to the Intrepid.
When will you be going ? There are less ship there now that RCCL is sailing out of Bayonne.And I seen last night on the news that Carnaval is talking of sailing out of Brooklyn.
Food for thought: I was considering doing the same thing because my trip departs the same day as the QE2 and the QM2 and I wanted to avoid traffic. But I reconsidered and hired a car because I have seniors and little kids. What happens if it is raining and you have to trek a couple blocks w/luggage and children in tow?