Dinosaurs, at least Carnivores and maybe some herbivores too should attack the Ranger Jeep if it gets too close, and they would be able to destroy the jeep and eat the rangers. You’d then have to repair the jeep for a small fee.
To not make refilling feeders and taking pictures too hard, the Rangers would have a horn that makes Tyrannosaurus sounds, (like they did in the first book) which scare herbivores and smaller carnivores away, but could also attract bigger carnivores, trying to defend their territory.
For the bigger carnivores, the rangers would have a weaker tranquilizing gun (Muldoon had these too in the book) that only tranquilizes the dinos for a few minutes. It would also be cheaper to use than the ACU one and could also be used to stop escaped creatures.
To not make refilling feeders and taking pictures too hard, the Rangers would have a horn that makes Tyrannosaurus sounds, (like they did in the first book) which scare herbivores and smaller carnivores away, but could also attract bigger carnivores, trying to defend their territory.
For the bigger carnivores, the rangers would have a weaker tranquilizing gun (Muldoon had these too in the book) that only tranquilizes the dinos for a few minutes. It would also be cheaper to use than the ACU one and could also be used to stop escaped creatures.