We were there in 2000 and it was our 3rd time camping as new campers. We spent 15 days there with our 2 kids ages 8 and 9 and had a blast. Disney gives out awards for the best camp site and we won two days before we left, you get a certificate with your family name on it and all the ice you can use. Unless things have changed the buses that run between Down Disney and the campground is free.
While you are there take a trip to the Fort Wildness lodge, it is made out of logs it is not far and it is in the campground and they have a great pool.
We went back in 2009, but we didn't stay at Fort Wilderness, my daughter play LaCross at Disney's Wide World of Sports in her first year of College, but we would like to go back now that the kids are older.....21 and 23.
Enjoy yourself, your kids will love it.
By the way we stayed in what they call the "Dog" loop, if you have a dog that is where you will end up and they do have dog setters on site.
If you want a golf cart reserve it ASAP!