I could be wrong on a couple of points here, but it seemed to me that the main characters bring to the island just two SUVs and the trailer. Then it also seemed to me that, when the T-Rexes started attacking, one SUV was occupied by keeping the kid in the high-high, and the other got shoved off the cliff before the trailer did. Still, another character pulls up in an SUV to bail Jeff and company out of the trailer. Where did that one come from?

Also--just a character observation--Julianne Moore's character's first lines are a riff on how important it is to leave no human mark on the dinosaurs. Then she gets right in the baby stegosaurus' face with the camera and TOUCHES it! Are they trying to say she's a thoughtless ding-ding?