Hello & welcome to the forum.
That sounds really great - I'm jealous.
If money was no object I'd love to tour all over the Santa Fe railway. To see places that are just names to me....the Belen Cutoff, Skull Valley, Cajon Pass.
And I love the old American diesels from the 1950s-90s, especially EMDs. The era of F units and boosters is just so stylish. I'd be off to find some of those preserved, and even better if they were running and you could ride behind them.
(I'd also like to ride Route 66 on a Harley...but that belongs on a different forum
).
Make sure you take plenty of photos...and stick some on here.
Best wishes, BW