UPDATE: Marc and Craig both forwarded this Hammock State Park Jeep Train Postcard from 1955 that’s for sale on eBay. It’s the earliest photo I’ve seen of the Sebring, Florida, tourist tram.
“This is a very cool black/white postcard that shows a jeep “Conducted Tour – Highlands Hammock State Park in Sebring Florida” It is unused, but has a hand written date of 1955 on the back. It is in excellent condition.”
Highlands Hammock State Park ran tour trains from at least 1948 – 1962. As the first photo shows, they started with a CJ-2A. It looks like a set of benches on a platform with wheels. By 1962, the park shifted to CJ-5s. It also appears they added sides. I images that was safer. These are all from the State Archives of Florida.