Only pack n' plays are provided, because they are easier to store while not in use and easier for Mousekeeping to move around the resorts.
You request it on your reservation and it will be set in your room when you arrive.
They will even make it up for you, just as they do the beds in the room.
We had a great mousekeeper last year, when we traveled with a young couple with children. The Mousekeeper made up a "trail" of his stuffed animals trying to climb out of the pack n' play.