My dad was on the organising comittee for Coalville (and Longsight).
A number of BR Parcels (later RES) folk from Derby were too.
Used to recall various stories of planning getting various BR locos in / out using planned freight moves where possible, plus arranging conductor drivers I recall something about 50008/15 took about a week to move.
I think quite often what turned up on the day wasnt always what was planned, and some occasions even the preserved diesel drags brought a different consist than expected.
Upside for me was just about everything that was used in the freight photo run pasts I got a cab ride in.
Anyone remeber the “Ding Dong Cab Company” ? Advert.. huge sign on the retaining wall by a railway / road bridge just off the yard, I spent a good two hours one thursday night ahead of time sat in my dads car looking at it, (no internet then), as he didnt want me moving around site whilst stuff was being positioned… whilst he said I could watch trains it was no comfort that he parked against the gate wall so I couldnt see them!.. just the taxi company, and the chippy selling pukka pies.