This is the first time on NCL and I don't clearly remember the proceedure from Royal. We are going on our cruise in late fall. We need to pay the other 1/2 of our cruise (paid for 1/2 when we signed up). When we pay for the other 1/2 (probably in August) will that be too early to do our online check-in? I know they suggest to do it at least 5 days prior and for sure a couple days prior to set sail. But how soon can you do that proceedure? Also, what information should I have handy? I think (if I remember right) I will need Airlines & flight numbers, pass port numbers, & credit card. Is that correct?