The Pixma Pro 100 has a pict bridge port, so you should be able to print from the camera... You can test this right now. Here's a how-to. The Pixma Pro 100 is only supposed to be 14W, so that shouldn't be a problem to power. They sell car battery booster packs that also have regular plug sockets on them. Make sure you're charged the day before, and you should be able to have power at your event wherever you want it.