You need to do the following when running a trial, this will take a lot of effort and numerous visits to the area.
Find suitable land for a trial
Arrange a date trying not to clash with much else
Contact ACU or AMCA for event insurance
Publicise your forthcoming trial
Check the ground for a suitable route as well as the sections
Clear any vegetation or debris
Signs to the event
Lay out route markings and section markers
Collect all entries, get everyone signed on, look after the monies
Find observers
See that everything is running smoothly
Gather up all markers, litter, make good anything needed, secure the area as requested by owner
Pay for use of site
Pay insurance
Tally up scores each class separately then forward to riders
Another job is get rider numbers prior to the event or have bibs ready, after the trial wash bibs if covered in ##@# then sort numerically ready for next time.
If you have not tried the above I suggest you do so as there is also a lot of pleasure gained from organising a trial but at least it gives an insight as to why the results come last on the list of things to do.
The electronic scoring is probably a nice thing if the club is well financed but if there is a programme of trial entrants numbers would still be needed but at least there would be no more rain drenched score sheets to try and decipher, unless water got into the electrics or someone lost their transponder or the scanner played up!!!