Here is a micro track plan designed around the Walthers Cornerstone Medusa Cement kit. I used a variety of covered hoppers and the SW 1200 switcher included with the XTrkCad program. The switching lead tracks (purple and red cars) are 14 inches long. The curved track leading off to the left could be hidden behind a backdrop or structure and be used as a fiddle track. Cassettes or a loco-lift could also be used.
As always, feel free to change this track plan to fit your needs.