According to the website, you have to reserve a date online before going there. It's to control overcrowding.
You only need to reserve your day during preview days, before official opening July 9th
We went on July 4th. We had to call because they were only allowing season pass holders in. I don't know if that has changed. Better to call first.
We went on the 4th and had to reserve it a couple weeks ahead of time. Not season pass holders
We went on July 3rd. Ordered tickets online. Not season pass holders.
Thanks! Your answer is awaiting moderation.