After googling the problem, I found that I can edit "per route camera blueprints." I used RWTools to explore the Track Rule blueprints .bin file in the RailNetwork\TrackRule folder, but couldn't find any sort of relevant field for camera values. I then opened the route Template .bin file and did see a reference to a file called "extcamlmt.xml".... but I cannot figure out where in the world this file is or how to edit it to bring the camera closer to my train. There were no values to edit (that I could find) within the template .bin file.
This image shows about how close I'm able to get on the Halloween route. I can get much closer in any other route:
Does anyone have any insight for how to improve this?