Yes, you can get to all those various places via highways, but also have to go over some high mountains and drive hours and hours. I don't think there is some mad kidnapper driving the roads looking for divorcing women - how would that even happen?
As a Tennessean, the main thing that bothers me is the fact that police here don't take these cases seriously. I don't like to criticize LE, but they need to hit the ground running and start in the home, not elsewhere.
Mothers don't just wander off around here, or start a new life without their children. I just don't buy that.
The main similarity in all these cases is the bad relationship with a spouse. To me that's the link police should be investigating. The problem is, as in the Palmgren case, if someone disappears in a car then the home is not considered a crime scene. At least they found this woman's car, so maybe there will be something there for them to search.