Will there be a sentient species or at least an organized societal grouping (like dinobees)? If I was SS I would have the community inadvertently drive off (or kill) a pack of utah raptor ravaging the countryside. The local pack of Troodon (smartest dinosaur) is gracious and while not able to communicate per se the pack becomes the guardians of the community and the community in turn befriends them. The scientists are amazed at the culture of these dinosaurs and come to the conclusion they are at "dolphin level". This pack has loose associations with other Troodon packs and the human presence pushing back the slashers, carnotsaurs and Trex has allowed these Troodon packs to focus on more than simply surviving.
We find they enjoy games (something like soccer) and we develop the relationship to the point they don't see us as food. Heck we even play them in dino soccer.