Logging railroads are one of my passions. I used to live about a half hour drive from Roaring Camp, and have been there many times.
They used to have a very tall timber trestle that burned many years ago (arson). Instead of rebuilding it, they put it some switchbacks, which are actually more interesting because that's how most narrow gauge railroads were actually built.
These are great shots.
BTW, the Dixiana is so named because it came from the Dixiana Lumber Company. It is a Shay geared locomotive meaning the wheels are driven by bevel gears off a drive shaft that runs down the side of the engine. The driveshaft is turned by steam pistons/cylinders that are mounted vertically on one side of the boiler. The driven wheels are articulated (they swivel) which makes this engine ideal for low-speed use over very steep, twisty rails.
Roaring camp also has a lot of equipment from the old Westside Lumber Company which ran both standard and narrow gauge. They have good examples of Heisler and Climax geared locomotives as well, although I don't know if they run. It's a fascinating place if you're into old logging equipment.
Thanks for posting these.