The ap rate requires you to activate passes first. You must go get pictures first for annual pass. Then show them your pass. You could try it and see? If you could just show them your voucher or confirmation number but I doubt it would work.
This is the way I always start vacations.
First night is always at an off property hotel. This is when I get all of the necessities out of the way. Going to the grocery store, activating passes and anything else that may come up. If you go to the parks after six I believe there is free parking. This is important to know if you don't want to pay the 8 dollars to park just to get your passes activated.
Next, morning . I go to the on-site hotel and check in as early as possible. This way I do not have to waist my first day running from the park to get my annual passes and make a mad dash to check into the hotel. Much more relaxing.