The only thing I might suggest are a few log wagons for the likes of Hancock & Gore and Brown and Broad etc in Brisbane. I notice you already have some wagons for sawn timber from the local mills. More timber material from John Kerr's research
http://www.daff.gov.au/rfa/regions/qld/cultural-heritage/sawmills-tramways especially
"Section 4 - West to Ipswich and Toowoomba, The Fassifern Valley and Ranges, Brisbane Valley, Toowoomba and Northern Downs, Bunya Mountains and The Southern Darling Downs " with links at the general DAFF URL shown above
.
Forest_Runner, generally speaking, very similar products to that which you may transport on your own "Brown Mountain" route. Certainly an inspirational route as some have noticed the BVL route's release last week has inspired me to do more research on that region as seen by my posts on the BVL thread.