Follow the buses after the tollbooth plaza, and after you exit the tunnel portal and bear left, get in the far right lane with them, and start to go up the spiral ramp. Signs from there are very clear.

I’ve always wondered why people drive in and park there, it’s the hassle of the tunnel and 495 traffic, plus NYC parking pricing. Unless someone is needing to leave NYC between 1-5 am, or is traveling with 4+ people, the North Bergen Park&Ride is cheaper and much more convenient, or even better, a bus/train from where you live.

Check Google Maps very diligently, to make sure you choose the correct lane going into the tunnel. I recall choosing a lane because it had little traffic, & when I got out I went all over the place. It was not fun.

It really doesn't matter. The tunnel on the right has 2 lanes, both of which allow you to go towards the port authority (if in the right lane, bear left after the tunnel). In the center tube, you can only take the right lane, which will split at the end. Bear right.

We normally take the train but are not going to be leaving until well after 2 a.m. when the train won't be running.

Far right or center and be ready to aggressively make that right turn onto the ramp that totally looks like you're not supposed to be there. If you miss the turn there is another entrance ramp on 39th but it takes a while to drive all the way around.

Being able to go back to your car throughout the day to pick up or drop off things, plus when you leave you go right to the tunnel and avoid city traffic.

South tube (the one on the right) and take the left lane.

Follow the buses into the ramp, but follow the "Parking" signs

That makes total sense.

There or the MPG Manhattan Plaza on 42nd/Dyer are good options.

Yeah this is accurate. Both lanes in the south tube will work, but the left lane is less confusing.