You can do either. I recommend buying online to save yourself a wait in line.
Buy online the box office can be slow or backed up for various reasons
You should purchase online ahead of time. We made the mistake of trying to do walk up and they told us it would be 1 1/2 hours before we could get in.
In advance
Buy online, they get full fast!
Its a long wait at the door but you can buy there
When we went last week, the time frames slots book quickly. We had to come back later because we didn't book online. So I would book online.
I had to buy mines online they wouldn't let me in without a reservation
You can buy it at the door
You can buy admission at the door no need to buy online :)
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