As for "sailingsoon" hopefully they get their cabin # in advance if not there are a few options:
1) I will pass out a FE list in FEs or under cabin doors on the first night of the cruise (likely after sailing away and dinner). I have 30 copies printed and will fill in the blank. Same thing with any cabin # changes, because there is alwasy one! Hopefully I will have the updated cabin # by them!

Sailingsoon will be provided my cell # to text me the cabin # once it is recieved.
2) I will keep a list posted in the top pocket of our FE at room 12000.
3) tinkybell14 in cabin 6514 has volunteered (and hopefully remember saying she would??? hehe) post a list as well at her door.
As for concierge access. I was under the impression that the Fantasy had them as well.... so there are a few options:
1) Sometimes the gates are left open and you get lucky and can just walk through (act calm and normal... no one will arrest you!! and you can totally act like tom cruise sneaking down the hallway all mission impossible style!)
2) flag down a stateroom hostess and ask them to let you deliver it or help
3) knock on the door of the concierge lounge and they will help you out with access or delivering.
4) drop the item off at guest services on deck 4 and they will deliver the item
Does that answer the questions? YIPPIE if it does.... BOO if not!
HAPPY NEW YEAR EVERYONE! Be safe out there!