Why not get one of these cheap rc cams. A man of your talent could rig up a power supply from the cigarette lighter. I don't know how long you drive for on average but with a permanent power supply your record time would only be limited to GB size.
I'm assuming this is so you can be an anonumous whistle blower, stick it to 'em
http://www.rc-monster.com/forum/show...316#post328316