Another good site is fortfiends.net.
We camp at Fort Wilderness 6 or so times a year since we live nearby and my wife works there. As far as getting from the campground to the parks, the boat will take you to Magic Kingdom; and busses to the other parks as well as Downtown Disney and the water parks. DO NOT try driving to Downtown Disney. The transition of Downtown Disney to Disney Springs is producing a traffic and parking nightmare; so take advantage of the busses.
All of the sites are great. I like to preferred loops (100, 200, and 300 loops). The 300 loop is for pets, 100 and 200 is not. My trailer fits in the preferred sites with no issues, and as stated above, are close to the settlement. The premium sites are a good bit longer, and some are convenient to the Settlement and others to the pool, outdoor movie area and the Meadows Trading Post. As with the preferred loops, some are for pets, and some are not. Most are pet friendly. Just be sure to indicate whether or not you have a pet.
Don't miss Trails End, the restaurant at the settlement. They have an amazing breakfast buffet that is reasonably priced for Disney restaurants. Lunch is off a menu; but is excellent, while dinner is an excellent buffet.
You can also walk around the horse barn, occasionally you can watch them shoe the horses. We were camping there this past weekend and got to watch that. There is also a nice hiking/jogging path from Fort Wilderness to Wilderness Lodge.
You can walk to the dock to watch the Electric Water Pageant on the lake, usually at 9:45PM and also to watch the fireworks from the Magic Kingdom. If you like fishing, we've caught some nice bass from the lagoon area behind the 300 loop.
Hope this helps.
Doug