Trucks are no good for escaping zombies, best bet would be to fortify your house, build an underground shelter, but keep something ready to escape. Should the Cambodians get you, the outbreak should be old enough so that most prisons would have shut down. What you do is escape from your now infested house, get to the prison(most hardened criminals should have left by now for looting and raping), and make that your new awesome zombie fort.