You can't go past security points. I have received a pass to help at other airports, in which you can go thru security without a ticket. You can go to baggage claim, upper level and where the trains pick up with out any restrictions.
Yes you can where you pick up luggage.
no
Yes, pick up and drop off.
Yes, pick up and drop off you can go to the terminal and meet them at the tram area (where the trains take you to and from the Airside/gate area)
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