The band we got on the Fantasy in Dec. will work in the park. Though we haven't been to the park to try it out. The ships recently transferred to the new Magic Bands the park uses. So in theory you can order the ones on line (with characters pics, etc) and use them on the ships in the clubs. Again you have to pay to keep them and then register the bands to you for your trip. I haven't gone thru that so maybe someone else can say.
I do know this because when I was at the park in Sept I asked if the bands would work on the ships and they said soon and when we got on the ship they gave us one for our son and I asked and they said yes it would work in the park, that's why we kept ours.
Now the question is will everyone soon on board get these bands as a replacements to the Key to the World cards? If so how do we keep the lights on in the cabin with out the KTTWC? (LOL)
Joe