As a kid I lived in Secaucus and often I went into NYC. Going from Secaucus through the Lincoln Tunnel brings you through what we called the “tunnel cut” just prior to entering the tunnel. It was narrow for buses at the time which were 8′ so with an 8’6″ coach you are going to be challenged to stay in the lane. You will share the road with buses that go that way every day and those drivers are used to passing with inches to spare. You don’t want to go through Jersey City to use the Holland Tunnel.
Just be on your “A” game, keep right and you will be fine. Then all you have to do is figure out where you have to deliver your passengers and the best way to get them there. Once in the city you will be OK.