You have to buy your tickets online, so you just show them the tickets on your phone. Makes the process much quicker, you will have to do a little bit of walking to get to the entrance.
We went about an hour after they opened and pretty much walked right in. The longest part was walking from our truck to gate
I don't reccomend going before opening time. Once the gates open their parking strategy is extremely organized and moves the line quickly. Going before opening time may only cause traffic blockage on the main street and not very fun for those needing to go elsewhere.
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