We're surprising the kids with a SUPER quick trip Jan 3-6. I KNOW it's going to be insanely busy, but I got a STEAL on the Hilton next to the convention center ($69/night!!!!) and I want to take them before all the Christmas decor is gone. We're going to add Maxpass to our passes before that trip, but do I need to do it in person or is that something I can do online or on the app? We're going to get there around 5 PM on the third and I'd love to just go in at that point and not have to wait at the ticket booths, but obviously will if I need to.