For his Pic of the Week, Craig forwarded this unusual train built on a jeep platform that was featured in a 1964 issue of Jeep News.
I found an example of the above train-jeep being used at Africa, USA, though the details were slightly different. These pictures come from cardcow.com.
I’m wondering if this jeep train out of St. Augustine, FL, isn’t a custom version of the above platform. You can see the older St. Augustine Jeep Trains here.