So what went wrong?
They did not do a proper risk assessment, did not understand the environment they were going into. They made bad decisions against all of the existing indicators that they should not go to that area.
They could (and should) have left a trip plan with someone.
They could have invested in a satellite communications device.
They could (and should) have avoided the off limits areas to begin with.
They could have stayed on a main road which would make it less likely that they get stuck. This would also have eased the walk out for her, and the ability of rescuers to find them.
As in many of our discussions in this forum, there are some basic things that anyone should carry in their car, more for extreme weather conditions and travel in remote areas. We have numerous lists and recommendations that anyone out there can read at no cost. There is little entertainment value to the mundane task of being properly prepared.
"Could have, should have" are all good in hindsight and easy for people on this forum to pick apart. The real bottom line is that unless the person(s) already have a ETS mindset, they are not going to be doing risk assessments nor looking on this forum or any other before they travel. Unfortunately it takes a life in balance survival event such as this before people
maybe learn from their mistakes.