Don't worry if the docs don't make it. You can pick them up at the pier....just keep your TA informed. Ours were shipped on 2/22 and didn't arrive until 2/28 so they are taking longer than normal.
All you HAVE to have with you at the port is your drivers license and birth certificate or your passport. They can do everything else there if need be. Now if you have
DCL transfers you will need luggage tags or Disney won't claim your luggage so make sure and claim it if the tags don't arrive. The porters can write up luggage tags and tag your bags at the pier so the bags get to your room.
Some agencies do have the docs shipped directly to them and some have DCL ship them directly to the guest.
Hope that helps!