Depends on the tickets. If they are one park then yes. It will have on the tickets which park you can use them for .
Yes tickets need to say party to park them you can.
Do you want to do both parks in one day? If your tickets are for park to park, you can do both one day, but if you have never come it is better than doing one park per day
need to "park to park ticket". but ask to ticket office.
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