I thought it might be interesting if I added a couple pics of the customized freight I found to accompany Uintah Railway #50. (I did purchase a LGB Uintah boxcar, not shown due to available space on shelf.)
Uintah water car #21:
After the water car are 3 custom made flat cars with gilsonite loads. The end is a fictional Uintah caboose #4. They only had 3 cabooses, all of which were 2-axle. The caboose was a USA 4-axle steel caboose that was shortened to bobber length, which I applied Uintah decals.