Sales office
You have to go there to more info.
The park just had Military Days from July 1-4 where admission was free to Active Duty, Guard, Reserves, & veterans. Valid ID or Honorable Discharge/Medical Discharge papers would make you eligible. Discounted tickets for family were available also. Not sure how this would work any other time, but assuming the same and it most likely won't be free, just discounted.
You have to go to the ticket sales window and show proof of veteran status.
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