The building in which human stuff usually resided was located at the far end of the Valley, right by Great Wall. Actually, the visible part of this place was like a top of the iceberg: more of this building complex was lying underground and also there was a tunnel that leaded outside, not only of Great Valley but the whole world dinosaurs knew. This world, as big as it might be, was only a filming studio hidden under a huge roof os concrete. Of course from the inside it looked in a way, that ensured none would thought that the sky he was seeing was unreal...
((I imagine that the Great Valley and Mysterious Beyond are very much like the set of "Truman Show". In a general way and not every detail, that is.

))
One member of the human stuff, who was responsible for feeding dinosaurs with their adequate food answered:
"He is not here yet. From what we know he might arrive later than was planned. We have breakfast ready for you though. Please, follow me." he started walking away. Actually, he didn't have that much work with providing food, because every plant, tree and berr-bush in a Valley was real, so the leafeater could feed themselves. Only predators needed to be nurtured, if the humans didn't wish them to hunt on other dinos...
Pessimist sees a dark tunnel. Optimist sees a light in the tunnel. Realist sees the light of coming train. And a driver sees three idiots standing on the track.
"My heart has joined the thousand, for my friend stopped running today." - Watership Down by Richard Adams.