Where do you draw the line then? Davis has already made multiple demands. Simon would be foolish to give in to every demand just so Davis will debate him. Yes, the press will provide cover no matter what, but I would bet good money that the LA Times will not be pleased if the Governor is a no-show to its event.
If Davis doesn't show because of Simon's insistence on Camejo's presence, the Times might blame Simon. They'll still cover for Davis when the time comes.