IDK from personal experience but I have HEARD that you will be just fine.
The online check in took care of all the paperwork. Anything else you can do at the desk. The only other thing missing is luggage tags and they are supposed to have extras at the port that you can use.
I don't remember off the top of my head but I think you are driving right?
We will be driving to the port. Travel agent has tracked them down and says she will drop off to us at WDW on Friday. But she was going to call and make sure there wasn't anything that I had to have just in case it doesn't make it to her.