The "rules" are the same as on site rooms, 4 and 1 in the pack and play. However, in the Inn, there are connecting rooms, so you could have the 2 rooms with the 4 queen beds. We had connecting rooms in August.
I also think there are some larger inn rooms with different type of bedding, maybe a king and a sofa but I've only read about them. They may suit your needs, and maybe someone here knows more about them.
We stayed in an ocean view room that had two queen beds and a sleep sofa. My advice is to call the resort and see what they say. I think they will take reservations for 5 for the Inn Rooms (but not the studios).