Ahoy, Ellen!
Congratulations on booking a Disney Cruise Line vacation! I have heard good things about using Costco Travel.
When your booking window opens up at 75 days prior to your sailing date (so around mid-February is my guess), you will be able to book things like
Port Adventures, spa reservations, and adult-exclusive dining. This is when you will be able to reserve your day at Atlantis.
You will make these reservations by logging into your Disney Cruise Line reservation on the DCL website. You will need your reservation number (should have been provided to you by Costco) and your birthdate. This will allow you the access to see what is happening onboard the Disney Dream while you are sailing.
On every 3-Night sailing, there is a
Pirate Night. You will see your fellow passengers dressed in their pirate-y best, many complete with hooks and parrots! It is my favorite night on every Disney Cruise, I love the fireworks at sea! For the best viewing of the Buccaneer Blast Fireworks, head up to Deck 12, starboard (right) side of the ship. You will NOT be disappointed!
I hope to see you here at the Disney Parks Moms Panel with more questions before you set sail!
Happy Cruising, Tracy V.