We srayed at both POR and POFQ when DD was little (and had a little wheelchair -it's interesting how the wheelchairs grow with the kids). We fit OK, but there were only 4 of us and once we got to the room, we were pretty much done for the day and the wheelchair was parked by the table at the front of the room. I don't honestly remember if she could drive around the room or not, but her adult wheelchair only has a seat width of 14 inches (which is pretty teeny for an adult) and her child's chair was even smaller. So she can still fit in places where some adult wheelchairs don't fit.
She was small at that time, so we lifted and carried her to the bed, bathtub and toilet. If we had added another person or DD was too big to carry around, I don't think it would have worked at all.
Here's the phone number for Special Needs Resort Reservations: 407-939-7807 (TTY: 407-939-7670)
If you need 3 rooms, you want to ask for connecting rooms. Those are the ones with a door inside that connects them together. Adjoining rooms are just next to each other.