It depends on the tune your flight arrived. They have more than one bus. I have seen up to 3 or 4 buses at the parking spot2.
Even though the card says to call only between 10pm and 7am, be proactive and call when you are ready. I have done that every time and have never waited very long.
Hmm... that's what I thought so everytime I saw north and south shuttles passing by...but I'm still parking at 2... lol
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