All of the trees are from Scenic Express. I purchased a large box of them many years ago from Bragdon when I was able to visit a train show in San Jose I think about 1996. The ground foam is from SE also. My ground cover is mostly from Carrs an english company that I blended to get away from Woodland Scenics to try something dfferent.
We are now entering Perry. Perry used to be Guthrie before I did the extention to the RR room back in 2008/9. Guthrie is now around the corner on the new penisular.
One thing I regret not doing is putting in service tracks beside the tracks in some places for road crews to service turnouts,signals etc. After following the SF all the way from Chicago to Oklahoma on one of my visits, I noticed just how many there were and it would have been a nice addition.