HUGE SPOILERS QUESTION
Indeed the montage answers most questions--- but I must have missed something.. Who/When/How Killed Miranda? Did this also happen during the kerfluffle in the boat?
-- And I see two explanations here -- interested who responds.. the entire beginning -- was that REAL and it happened many years ago? ( So when they get to the campsite and get out of the RV it's really many years later) .. OR is the whole beginning NOT real and part of their delusions?