Download the app and make reservations there. You can also add tickets and season passes by the serial numbers from your pass. The app also saves your pass and tickets for easy access and scanning for entry into Cedar Point
My season pass from 2020 worked on Friday.
Same situations here , just contact them, they will sean your QR at the park, even you may upgrade to fast pass, truly recommended, have fun !!!
If you have a pass it should transfer over to 2021 but if you have a ticket I believe you have to go in person to get it changed. I don't think you can change it though you can try.
You just ask your dad
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