Okay.. because I remember we ended our tour in Animal Kingdom with a special standing area to see the parade. After it was done, we were let loose in the park.
I don't think it works that way any longer. When our tour was over, we were returned to an area outside the gates at Epcot. A park admission was required if you wanted to re-enter any of the parks.
Here's a quick rundown of what we did, hope it helps.
Epcot - We went behind the scenes at the American Adventure where they showed how the show works. Quite amazing design as they needed to work around the water that is immediately below ground level in much of Florida. They showed how each scene moved into place and how the unused sets are stored while another is in place. We then went outside to the "public" area of World Showcase and they gave a real-life exercise in how forced perspective is used to make buildings appear larger or smaller than they really are. This was also fun because World Showcase was not open, so except for a couple of cast members, our group were the only ones there. Made for great pictures of a completely empty park.
Animal Kingdom - up close look at the parade floats, how they're powered, where they're stored, and how they're controlled. Also did a tour of the horticulture area where they show how the trees are staged based on size to be able to replace trees in the parks with something the same size. Trees that are dying/diseased are often replaced overnight and if you visit 2 consecutive days you may not even realize that the tree you see today might be a different tree than was in that same spot yesterday. Also saw the greenhouse with all the flowers and the topiaries that are either past their prime or not yet ready for onstage.
Lunch at Whispering Canyon, including dessert and drinks.
Hollywood Studios - 2 locations - first we did a walking tour of costuming. How they're made, when they're washed, design considerations, etc. Very Interesting. The other location was a back entrance to Tower of Terror. I was super excited about this as it's one of my favorite rides and I was hoping to see some of the ride mechanism, theming elements, etc. However, all we saw was a copy of the ride vehicle and a high level overview how the ride worked. Nothing much at that part that isn't readily available on the internet, and not much to see in the small garage at the back of the building.
Magic Kingdom - a tour of the Utilidors. Very interesting as they spent time showing the various maps and where the secret entrances come out to the park. Also saw a bunch of cast member areas and talked about things like garbage collection, supply delivery etc. After the utilidors we went back "on stage" and waited for the 3:00 parade. Our guide pointed out how the floats are controlled and how the various second floor windows on main street open and close as the floats go by in order to balance the appropriate sounds of the parade based on where you are standing/sitting.
I love Disney history and theming, so much of the tour was already things I had read about. However, actually being in the utilidors is a lot different than just reading about it. Also, being able to be backstage to see how things work is always more interesting than just reading an internet page about it.
I don't think I gave away any excitement of the tour, as I hear it constantly changes and we took it several years ago. More trying to give you a feel for the type of things you will see to help you make a decision as it is an expensive tour.