Been a long time since I have had to use keynote. In the end I started using my iPad or iPhone for keynote displays. I would set it all up on my iMac and save to the iPad and just runt out of that. It gave me a controller as well as running the whole thing. It did require a network though as I was using an apple tv connected to a projector. Can you create a network I wonder with your iPhone and connect the device running it to that?
ďIf you are neutral in situations of injustice, you have chosen the side of the oppressor. If an elephant has its foot on the tail of a mouse and you say that you are neutral, the mouse will not appreciate your neutrality.Ē Bishop Desmond Tutu