FYI - the Hoop de Doo Musical Revue is at Pioneer Hall in Fort Wilderness not the Wilderness Lodge. I agree it is a must do once.
Fort Wilderness also runs the Campfire Program nightly which is great (marshmallow roast by the bonfire with singing then a Disney movie) - check the camping board for more details
The Torch lighting at the Polynesian is fun (it is actually the start of the Luau dinner show).
Also - Sitting by the shore of Bay Lake to watch the Electric Water Pagent is low key and fun.