We are arriving at 9:30am on January 1st, staying at ASM, and taking advantage of the free upgrades for our tickets. My question is - can we go to the parks prior to check in since the park tickets and room reservation are tied together? If so, how do we do this? We have tickets to SeaWorld as well and could go there 1st, but we want to hit Splash Mountain and Rock 'n Roller Coaster as much as possible before they close for refurbishment. Thanks!