The Wilderness Lodge participates in Magic On Demand, our demand based dispatching system. Theme park buses are typically dispatched every 15 minutes, however, with increased demand, the interval might be closer. Prior to 11am, theme park buses go from WL to Grand Floridian, and then onto the theme park. After 11am, Epcot and Studios buses share with FW instead.
WL also has a bus that runs to the TTC. That bus runs every 10 minutes on a fixed schedule. From the TTC, you can ride the monorail to the MK or to Epcot.
Although in the past, there have been some folks who have had isses with WL transportation, recently, folks have been saying that it has been fine. In my experience, I haven't heard of any problems arising at WL lately.