I just wanted to say welcome to the Disboards!
Up until a few years ago, Fort Wilderness offered what they called "Settlers Rates" for long term campers during the winter months. These rates were much lower than the rack rates charged for the campsites. They stopped offering the reduced rates as the campground has become more popular, and they apparently are able to keep it full enough without having to offer those discounts.
From what I have seen, there are less and less people each year who spend long stretches at the Fort. One of the members here, Des1954, knows some of these folks, and has reported that a lot of them have shortened their stays at the Fort, and have begun to stay elsewhere.
This past winter season was a bit unique, in that various loops have been closed for renovations. I would not be surprised, if the economy continues to stagnate, to see some type of discount rates offered again for long term campers.
TCD