Finally made it to Austin, someone saw me broken down and offered to buy the wagon, and my wife's brother came to the rescue. It was a crazy 3 days with a total of about 10 hours of sleep. I'm so impressed that the car brought us to Texas with not a single issue until the end. Mopar for life. Gonna miss that tank.
Thanks to everyone who offered assistance, advice and well wishes. All very much appreciated, and I'm glad we made it.
Jared