We will make our first visit to the Fort in June. It will be our first extended vacation with our TT. A full week at The Fort/Disney and another full week coming and going with a day or three thrown in at Gatlinburg to break up the return trip... I was warned to not camp a Fort Wilderness first because it would spoil you. A friend that has visited twice says all of the glowing things said above and also mentioned "the laundry is cleaner than my house"
It IS pricy. We're going whole hog and renting a cart for the whole time even though we have bicycles just because it's vacation and it may be many years before we can visit again.
I sometimes haunt two other online communities: Google "Fort Fiends", and "Dis Boards". There may be others as well. These two have a whole lot of good information (warts and all) about the Fort and a lot of tips and hints, and even some history of the happiest place on earth.
Happy camping!