The cabins are full fledged stand alone homes with full kitchens, a living room, a bath, a bedroom, and full housekeeping each day. There is a double bed and a set of bunks in the bedroom, and a double murphy bed in the living room. The price ranges are $255 - $395 per night.
Now, if that's what you were expecting, fine. But if you were just expecting "cabins" with cots, then this is not what you need.
Fort Wilderness has a group camping area at $10 per night per person with a large area to set up tents, a full shower house, available water, and picnic tables and fire pits.
Also many Scout troops also elect to book several campsites in the partial hookup loop where there is a driveway, electric and water at each site, and an area to set up tents at each site. 10 people are allowed at each site and two large tents and a dining fly are allowed at each site. When I was at Disney last, there was a large troop that were spread out in several sites with one site set up as the "kitchen" and the rest set up with tents. The sites range from $42 per night up to about $80 per night per site.