I am staying at POFQ the end of Jan. I want to add Genie + but already have base tickets for each park. Can I add the Genie + when I check in the resort the day before? I have tried adding it on the My Experience several times and it won't let me on the website or app. I have also tried calling several times but I get impatient with a 90+ minute wait time and when I leave a phone # to call back they always call back when I don't have time to talk. Can I just wait until I get there to add it, or do I risk it being "sold out"?