One gig I once did my band and the other support agrees that we'd supply drums and they'd supply the amps. None of my band had cars at the time so we carried the drum kit through town. We turned up to find the other support had brought nothing at all, despite all of them driving to the venue.
They wouldn't go and get stuff, nor give us a lift to collect our amps. So we ran, literally, around to get our amps.
We opened and once we finished, as the arses were getting the instruments together, we took all the equipment off the stage.
The promoter then had to pay us their fee for use of the stuff.
I will shortly have a nice new, to me, compact rig which will allow me to take my knackered old set up as back up in case of having to share stuff.
Or I'll just DI from my BDDI.