Not sure if it would fit in the closet (kind of doubt a large one would), but they did raise the beds in the YC to make room for suitcases to fit underneath.
As for the ironing board, never used it, but if it's like the one in my house, it should be pretty simple to use!
I know you can get bed bugs anywhere and disney is diligent about that sort of thing. But I do not really like the idea of putting my luggage under the bed that was why i was hoping to be able to put them in the closet