yes, there is shuttle service. you will have to take the air train to your appropriate terminal.
I think they do ,but best is to call them and find out . Just to make sure you getting the right answer from them.
If you're dropping off between 12am and 6 am, you can return to National across the street. From there you can take the Airtrain, which is directly above.
Yes there is
Thanks! Your answer is awaiting moderation.