#1: I would have ran away once the T-rex left the area. I'd run the whole way back to the main building. #2: I would drive that double-RV (or whatever it is) off to the beach. #3: I'd listen for a jingle. If I heard it, I'd run.
I am too dumb to survive in Jurassic Park so I dinosaur would eat me or tread on me. But before I die, I would try to find a place where I could hide and a gun. I'd die trying.