I am progressing on the T-34/85 tank, but using the picture I mentioned before, I note that the tanks also had a number of softskins travelling besides them-many captured German vehicles. I wondered which kind of vehicles and what they had in them (fuel? ammunition?)

I see:
- Henschel 33 3-axle truck (well camouflaged);
- MAN 4500 (or truck, very similar to MAN);
- some like Mercedes - Benz L3000 with house type body;
- Bussing NAG bus.
Sadly - very-very sadly ! - much more vehicles are not seen clearly. It could become the great reference about the use of captured vehicles by Russians.
As to their loads - I feel sure, they carried usual military loads - spares, ammunition, water, food, oil, tools, fuel, soldier's uniforms and belongings, etc, etc. - i.e. nothing unusual. The buses could carry the staff people together with maps and other staff papers.