I didn't think that there was a bus that went directly to FW. But this is the exact post that I saw on another thread: "NOTE2: A quickie about transportation. You can take a direct bus from most resorts after
approx 4:00pm. Due to HDDR and Campfire, they run direct busses. You can also take the boat from either Contemporary Resort or Magic Kingdom. Ride makes a really nice start to the evening. On the way back to the resort, take the boat to MK and then the bus, as direct buses to the resort are not available. If really in a hurry, take the internal bus to the Outpost and a taxi to your resort."
This is where I got confused. I was just trying to make it easier on my brother and his family. They are actually driving, so I will probably tell him to drive to FW and catch the internal bus. Might be easier in the long run.