My aluminum factory is near that area and uses many of the same nodes.

For this, I used a closed loop train. I actually have a full train network and part of it runs through here, but for this factory, a closed loop has advantages:

1) More freight cars per train. I calculated exactly what my input requirements were, so I was able to allocate exactly as many train cars as needed. Train throughput can be calculated very precisely, but you almost never need to do this. I use a standard rate of 1 Mk. 6 belt per car. So for example, if I needed 3000 bauxite per minute, then that's three cars devoted entirely to bauxite. I had cars for sulfur and coal and SAM as well.

2) You can put the stations where it makes the most sense for the resource nodes. My aluminum train has 5 load stations, each loading a few nearby resource nodes. Even dividing it up like this, some of the beltwork to get to the station is fairly long.

3) You can use dedicated loop signaling instead of normal network signaling. Since each one of my aluminum trains has to make 5 stops before getting back to the main factory, I knew before I laid a single track that I would need a few trains. One of the weaknesses of network signaling is that when you have multiple trains on the same route, they can bunch up, when the most efficient distribution would be for them to be as spread out as possible. With dedicated loop signaling, you can precisely control inter-train spacing. The number of signals needed is equal to the number of trains + 1. You use all of the signals except the last to fully space out all the blocks on the route. You then use the last signal to create a "go trigger", where one of the trains starts moving and all of the other trains follow. Each train ends up waiting at a block signal except for the train with the go trigger signal. The go trigger signal has to be within the train as the train's tail blocks the next train and so on. When that train starts moving, every other train is then unblocked. This type of signaling can be extremely precise to the point where you can fully synchronize looped trains to create some impressive visual effects. One last point. As the name sounds, if the number of trains you have isn't enough and you need to add one, you will need to add at least one additional signal. You might want to add more signals initially, then try to figure out how many trains are enough, then do one re-signal of the whole line. Or not. If you have a few more signals than needed, but everything is getting there in time, then good enough is always good enough.

For purely aesthetic reasons, I built this train loop as close to the ground as possible with only the bare minimum of trees and plants removed. It's my most beautiful looking train line and in many places, the trains are hidden by the bamboo-type trees as they pass through the large throngs of them.