Although PO-R Alligator Bayou says that it sleeps 5, the 5th bed is actually a trundle, which comfortably sleeps a child. And the other 2 beds are only doubles.
Try CR... the rooms are just about the biggest and there are 2 queen beds and a daybed. Of course with the extra 3 adults, be prepared to pay an extra $75 per night, no matter what deluxe you choose, and an extra $45 per night if you opt for PO-R.