Yep, every Disney hotel we have stayed at had either a pack and play in the closet when we stayed at the Villas (at the Poly they had a nice metal crib when we requested a crib) we stayed at a regular room in the Poly, everywhere else was a villa.
They provide a fitted crib sheet which they change when they clean the room, but you need to bring any other blankets (it gets cold with the a/c on since we stay every summer so I always brought a small blanket from home to cover my daughter). The only blankets in the room are the ones they use for the beds which would be way to big for the pack n play or crib.