I believe that the original idea was that no transportation would be provided to those forced to park at GardenWalk or Pumba.
As of tonight, Disney had chartered buses to shuttle people between these locations. There were lots of them. They drop off/ pick up at the bus station near the Lion King Tram (if you're looking at it from Harbor, its the middle peninsula).
I'm not sure if Buzz will get the privelege of these busses but we'll soon find out.