Thanks, all. Great information. It's fantastic that this knowledge exists.
The Missionary does sound like the way to go, even if it does go out of the way a bit (Los Angeles). Traveling with five kids and having to change trains and get your baggage transfered would have been difficult.
I think you answered my questions about food. The Wikipedia entry on the Fred Harvey system sounded quite fond of it. I think I can find a way to have a Harvey Girl make an appearance. Helen, the eldest daughter, did end up working as a waitress in Bakersfield.
What was the Fred Harvey and the Harvey Girls status in the mid-20's? All I've read so far describes them in their early days. I expect the Harvey Girls' dress changed, but not by a lot. Then again, the roaring 20's were just beginning to roar and women had the vote, a very different situation thatn when Will Rogers said the Harvey Girls brought food and wives to the west. I guess I need to watch the movie.
What kind of engine pulled The Missionary? I assume it was a steam engine, but in a few years would probably be deisel-electric. And how fast did it travel? I have a book from the 1870's that recommended traveling west for your health, instead of to the spas in Europe. It described train travel in the east as being too hurried, running 45 mph, while out west it slowed to a more relaxing 25 mph, slow enough that one could take in the scenery and wildlife.
It was interesting reading the policies, such as fares for children, the handling of baggage, transportation of dog, pets, etc. Passanges were told to bring on board only what they needed for the trip, much like airlines do today for carry-on items. Anna, the mother, probably had to get creative to bring enough food on to keep five young stomachs quiet.