Beyond the whole "borrowing/lending gear" argument, the thing about the OP is that someone points the finger at him and makes him solely responsible for the success or failure of a gig depending on whether he lets others use his stuff.
That is just jacked up Little League playground bully BS. So there's only one pro-level bass player in the whole bunch, he's responsible for all the hack wannabes full of excuses why they won't/don't/can't bring a simple bass rig, and there are no alternate solutions?
Crap-ola, the kind of multi-band shenanigans I try to avoid. Some nervy wannabe entrepreneurial type suffers from illusions of grandeur.
Sorry for the rant. I'm disgusted that people try to pull this crap on others.