John,
Yes, the main photo I want to locate is of the full Tub Run Bridge from any era. I do have a photo of downtown Thomas, showing how the Main Street buildings are on a hillside. I will have to scan that. That would be a backdrop item, and I agree about the station as well. It worked well for you on your Izaac Walton Inn.
I think I have a source for mountainous backdrop for the main line. I may have to wait on the towns. That may not be so bad, since they are at each end I could maybe slip them in from the side at a later date. Our daughter mostly specializes in three dimensional art, as in dolls, crocheted stuffed animals all of her own designs. She does excellent painting, but gets bogged down with other interests. She has a 3/4 completed (in my estimation) portrait of our other daughter and son-in-law on an easel in our family room. It has been there for 2 years. lol My wife suggested I pay her for any backdrop painting. That may be what happens on the towns.