I know you can book excursions, palo, spa, and flounders~this is at 105, 90, or 75 days right? I know you can register the kids for the club~is this also the 105,90 & 75 day thing? I know there's something called "online check in" ~~what exactly is this and when can you do it? If you do it, what do you need to bring to the port? Can you just disgard your docs that come in the mail? Can you book the spinning or excercise classes online? If so, when? What else can be done online? All the details please!