I really would pass on getting rid of any of the dry transfer cars. They are sort of one of a kind, even though they're old blue box kits. They were my first attempts at customizing cars 20+ years ago. I do have a couple of REA reefers and I do run passenger trains, but the operation is a bit rag tag.
The primary service is a leased Northern Pacific RDC with a club car in tow. Next is an old gas electric.
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After that a passenger may be lucky enough to get a seat in a drovers caboose.
View attachment 49162 Sometimes an old NP combime may be run in place of a caboose for passenger service.
The last is a tourist train that the Northern Pacific runs during the summer to take tourists to West Yellowstone and Yellowstone Park. The Northern Pacific actually did run a train to Yellowstone park, Fron Livingston, MT to Gardiner, MT which is the northern entrance to the park.
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I would love to be able to run long passenger trains on my layout, but being that is is a short line serving rural towns, they wouldn't have run here. Growing up we took numerous trips east on both the Milwaukee Road Hiawatha and the Northern Pacifics North Coast Limited. I loved trips on those trains.