I think you'll fall in love with Ft. Wilderness. It is the best campground I have ever stayed at. We were there this past February. Stayed in the preferred section in a motor home.
The cabins are a little farther from the marina area, but they have internal busses that run very frequently or you could rent a golf cart. That sure looked like fun.
It's very pretty and peaceful. The Trails End Restaurant is excellent (and the best value on property). The petty zoo, beach, water rentals, barn with the horses that work at Disney, and, of course, the sing-along with Chip and Dale followed by a movie are all wonderful.
Have a great time, you won't be disappointed.