Being an old fart who was old enough to have ridden on both the North Coast Limited and the Hiawatha, I did get interested in the transcontental streamliners. I know that I had seen something about the practice of using a standard height car between dome cars. Thought it may have been the Santa Fe. Never did get to ride on any other streamliners. The GN Empire Builder crosses the northern part of the state, and the Uinon Pacific, Santa Fe, southern Pacific and others are a bit far away. Guess I had a senior moment.
I wish that I could justify running one of these trains on my layout, being that my freelance railroad connects to both the Northern Pacific and the Milwaukee Road, but being that it is a short line/bridge line through rural areas, neither of these trains would have a reason to appear.
The Northern Pacific did have a spur that ran south from Livingston, MT to Gardiner, MT to bring passengers to Yellowstone Park. In my freelance world, I do have a couple of NP cars show up to take a tourist train to the west entrance of the park at West Yellowstone. Nice thing about freelancing is that it's my railroad. For normal operations on my line, the best I can come up with for passenger service is an NP RDC dragging and NP lounge car for the premier train. Other than that there's a gas electric or a drovers caboose. That's as good as it gets.