I would recommend paying inside at the desk. They usually offer more discounts there.
You can pay inside. Also I'd recommend considering a membership. I got one for myself and my two kids. About $29 a month for the platinum membership allows access to everything and for as many times as you want to go for the month. It's affordable and way cheaper than paying when you go. Just a friendly suggestion.
You can pay at the front desk for your wristbands
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