I would go to the MNSSHP if you haven't been. I hear it is a fantastic event, but more than that, you can get in at 4pm and get a full 8 hours for less than the cost of a single day at MK(unless you go on Halloween, but the September dates are well priced), so some people have used that as a strategy to save a day on their tickets. Also, there is special theming for Haunted Mansion, special parades and shows, and rare character experiences(Jack and Sally, all of the seven dwarves, villains), so it may be worth it. My personal plans are Epcot, the Halloween Party, and a day at Volcano Bay(this would be the deciding factor on a Universal annual pass for me). Anyway, back to the main subject, I am well aware of the location of the buses at MK, since I passed through there on the way to the Polynesian bus stop when I went down this month(ticket upgrades, such a pain) and needed a bus to Blizzard Beach. However, Ft Wilderness does have a boat to Magic Kingdom, the Contemporary, and the Wilderness Lodge, so it would be easy to catch one of those and then take the monorail to Epcot as well.