What to bring:
Formal Attire
There will be 2 formal nights, being a two-week cruise. Some people just dress nice, and a lot go all out with tuxes and gowns. Tuxedo rentals are available, and information will be provided in your pre-cruise documents. You need to reserve a tux at least 2 weeks out, and it is delivered directly to the stateroom (and you simply leave it there for pick-up). It's the same price as most rental places, and far more convenient and easy!
On one of the formal nights, it is themed Oscar-style, as the Golden Mickeys. There is an exquisite menu that evening, and you'll walk the red carpet on the way to the Golden Mickeys show that evening. It's just like being at the Oscars, Disney style.
It's a brilliant show!
Semi-Formal Attire
We will also have 2 semi-formal nights. Think cocktail gowns and suits. But, some just go dressy, as with most dinner nights. (However, it's a lot of fun to dress up - it really adds to the atmosphere.) Semi-formal to formal attire is also recommended for dinner at Palo.
Dinner Attire
When dining in the main dining rooms (Lumiere's, Animator's Palette, Parrot Cay) for dinner, "dressy casual" is recommended. I usually wear a nice blouse and skirt or pant ensemble with dressy sandals. Men often wear a collared shirt and slacks. Dressy casual is also recommended for brunch and high tea at Palo.
Daily Wear
Yes, it will be warm, but also plan for cool nights, especially once we start heading north in the Pacific. (Trust me on this - I remember from the Mexican Riviera sailing in 2005.) Bring everything from shorts and tank tops and also a couple pairs of pants, a sweatshirt, and also a jacket. It can, and more than likely will, get cold in the evenings during the last few nights of the trip. While the ship is kept temperately comfortable in all weather, you will want to be prepared for being out on deck or on your veranda.
Swimwear
Doesn't matter if you're fat or thin - bring your swimsuit! People of all sizes are onboard, and no one "gawks". There are wonderful pools and jacuzzis onboard, and it'd be a shame to miss them.
Costumes
There are various theme nights, including Pirates IN the Caribbean. While costumes are not required, plenty of people do dress up and join the fun (although those who wish not to, are certainly not out-of-place). Also, the nightclubs offer 60's, 70's, and 80's theme nights. You should see some of the stuff that people bring from the backs of their closets for those nights.
I will do my best to find out the theme line-up and post it in advance, for costume planning. (If that's your bag.)
About Laundry Service
There is a laundry service and also self-service laundry available onboard. Usual cost for self-service is $2 per load for wash, and I believe the driers are in 30-minute increments at $1. Detergent is also available for purchase, but it is much cheaper to buy a few individual powder boxes at your local laundromat and just pack them in your luggage. With onboard laundry services, you can get away with packing less clothes, especially for a 2-week cruise. Remember that more luggage = less space in your stateroom! (You can store about 2 suitcases under your bed, and 2 on the closet floor. It's recommended you fully unpack, stash your suitcases and use the drawers and closets - makes things a LOT easier, and you can store your suitcases within each other, making for even more space.)