Yes you can
Yes. If you are military, you can also present your ID in person for an additional discount.
Yes
Yes, paying as you go in. Never know when change of plans comes up.
Yes, but line is pretty long
Yes, but I recommend getting them online. It's faster.
Yes but if it's busy and you buy them online you won't have to wait in line to get tickets
Yes you can at the entrance
yup
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