my experience ( disney hotel, not hollywood):
one room one king size bed: 2 adult, 3 year old son slept with us. infant slept in BB bed.
my son always fell from bed, so I requested a kind sized bed, so that he can slept between us. BB bed is free of charge( beautiful Pooh Pooh BB bed with all bed linen). Just tell the staffs when u check in. There is a sofa, I remember it's a sofa bed, so maybe u can ask the maid to sleep in the sofa bed.
Remember to ask for the bathtub and milk warmer, all free of charge.