I don't know if the WL has any cabins or not. Maybe they do, but my family has never been there. However, we have visited the Ft. Wilderness cabins for the last 2 years and think they are great! Of course, my family only traveled in a group of four (2 older teens and 2 adults). It might be a tiny cramped for 6, but I think that you could probably do much worse. Only one bathroom, but at least it is nice and big. The pools are pretty "standard" but still nice... and rather peaceful. I definitely would recommend a golf cart. It makes it easier to get around, and the grounds are pretty to just ride around and look at. I think our passholder rate last year was something around $160 (but they may charge a little more per extra adult after "double occupancy").
When weather allows, Ft. W also has Disney movies outside in the evenings. You can watch the movies, eat s'mores at a camp fire they set up, and just relax if you need a break. For kids, if you go a little early, Chip and Dale come out to take pictures and shake hands. Further, if you don't feel like cooking sometime, the sit-down restaurant there (sorry, I forget what it's called) serves excellent food buffet style at a semi-reasonable price for Disney. Hope you have fun!