Get a cheap digital 8 camcorder that has audio and video inputs and a LANC controller. A Sony TRV520 works fine, a 525 doesn't - no LANC.
Get a camera from JonesCam.tv. If you're not going to be in rain, remove the rubber seal behind the lens and add anti-fog to the inside of the lens.
Figure out how to mount the camera, the LANC and store the camcorder.
Record away.