I always try to run something prototypically accurate for the area as a special train.
So if I'm at the Temple TX show, I've got a prototypically correct consist for the Amtrak Texas Chief/Lone Star circra 1972-73, down to the ex CZ obs on one consist and the ATSF passenger yellow bonnnet F7A on the other. I've had folks comment they remembered seeing or riding the train back then.