Yes but keep in mind they closed at five.
Yes
Yes, but if you want guaranteed entrance you are better off getting the parking ticket, reservation and entrance online. Don't just get the admission ticket you have to reserve the day as well.
Yes tickets can be purchased at the park, all rides and food vendors were up and running.
Yes you can. SeaWorld is has shorter hours. Not many rides working and animal exhibits are very limited. No food or beverage stands are open. There are 2 or 3 restaurants open. I hope this helps.
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