If I was touring at that level I'd make sure I had competent techs that could do it for me, same as guitar/amp techs, FOH Engineer, lighting engineer, stage manager and on and on.If I was an artist touring these days relying on a system running tracks, etc for playing my music, even if my tech had it dialed, you can be damn sure I'd have a copy of the system myself
How is by making them prove the backup works as per \/
A colleague and I have created a policy for our group, that you have to prove that your installation can be reproduced -- installed from backups on a new computer by following documentation -- before any major review or deployment. The only way to get there is to actually try to do it.