Yes, you can
Yes but its easier for them to just scan the email!
Yes
Yes. Parking voucher, if purchased online, works the same way. Would recommend buying the parking voucher online with the tickets. Same price, but saves time going through the lot gate.
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Yes I did exactly that. They email them to you and you can pull it up that way or I just screen shot the ticket and did it that way. It's really easy.
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