Jim, right after that Trainfest, I started with an MTH PS1 Rock Island E8 ABA (long ago converted to PS2) and two PS2 Rock Island Geeps. For the latter I scrounged around for every Weaver Wayne Feeds PS-2 hopper I could find. Then I discovered the Grain Train and IH hoppers and hopped on those. So you are spot on about the PS-2 hoppers.
In fact, the chances are that I bought no few PS-2 hoppers from you twenty + years ago--and no few more cars and engines until you retired.