Any public transportation will accommodate you
Take the bus back to the terminal. Look for the Joe's Parking and Sheraton Gateway bus at the courtesy shuttle area. They run every 15 minutes or so.
You can , but they will charge you extra fees
Call National and find out.
Uber or Lyft would be good options. Your hotel may offer a shuttle. You could call them to confirm.
I’m unsure. There’s definitely shuttles once at the airport.
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