Check out the Wash. State DOT home page. Look for "Grain Train" under
"Public Transportation and Rail Division." There's a great color picture of
the state owned grain cars plus a narrative of why the state purchased them
and how and where they are operated.
The address is: http://www.wsdot.wa.gov/
Duffy Littlejohn's "Hopping Freight Trains in America" should have some
photos, though I do not believe he includes the luxurious 2 bedroom
Canadian grainers.