Easier power hookups for outdoor cams

I'm wanting to place a stick up or spot light cam just outside my garage door. The way I understand it as it stands is that in order to get the power supply to it I'd have to drill at least a 1/2" hole for the usb cable for the stick up cam or over a 1" hole to fit the wall plug on the spot light cam. What would be great is to have a way to just send a skinny bare wire through a much smaller hole and connect the power supply cable at the wall plug in.