During our post-retirement tour of North America, we included Bradenton - Sarasota.
We observed numerous cuts of assorted RBB&B cars; all assignments, past - present - and future, parked on many sidings. Easy to find but not set up for roster shots. Best to use the online service of the railfan students of this different part of the railroading scene. "Somewhere" is their shop; including their own switcher?

Also, find their hard-rubber tired piggyback trailers. So that they can enter Eastern cities with clearance restrictions. Only RBB&B is "allowed" to operate such hard-rubber tires on the public streets of the cities they visit.

Reread the article in TRAINS; written by the father of one of their Masters of Ceremonies; not the one with the vertical hair.

We also found the Tropicana plant, with their private fleet, and a dedicated CSX switcher crew.

Southeast of Tampa is the open-pit mining. A very big-time railroad show, with views from county roads.

Suggest developing a map of "want-to-visits". Your turn will come.