At some of the resorts, you will see signs for the park buses. If I remember correctly AKL is one of those...there will be maybe 3 different waiting areas, each for one or two parks. Then, when you see the MK bus drive up, just head there, to that bus area. The buses are very clearly marked. It's all in one long area....each area is about 15', then it runs into the next 'park' area...hard to mess up!!
At the parks, they are also plainly marked, overhead. Once you get there, you will be surprised at how easy it all is!!!