As far as I can tell, none of them offer bunk beds. I did notice that the Disney Grand Californian Hotel has rooms with a sofa sleeper though, so that might work for you. Frankly, their rooms are pricier and aren't usually meant for larger groups. I do have a whole post about staying on property though. Remember that a Disneyland Resort hotel isn't necessarily closer (in fact, a lot of times it is not).