Ok. So it's my first trip alone with my family to WDW. First. What is online check in? Is the a benefit? I heard you can make room request. Where do you do and how do you do online check in? How early do you do online check in? I guess I need to know everything about it. Lol. Also on a side question. On the MDE app/site there is a spot to add a charge card. How early do you do that? Or do you do it when you check in? Thank you in advance.