You meet just inside the main gate on the right at a booth I never noticed before that is designated for the various tours. You will spend most of your time in the World Showcase before it opens so drinks, film etc. The tour just ambles along with the guide answering any question that comes up and talking about what you are seeing and why it was made that way. The tour is conducted by one of Walt Disney World's gardening crew working foremen. At the time there were 13 gardening crews for the parks and resorts.
Some parks have more than one crew.
The crews work typically between 4 AM and Noon. This allows them a few hours in the parks before they open to guests and then time for activities in the nurseries. Our guide was very knowledgeable about Epcot even though he normally works in Disney-MGM Studios . He had been with Disney for 5 years. The guides do this on a volunteer basis so you have a guide that wants to be there, and if ours was any example very good at his job.