The only time I would suggest "bugging-in" in a vehicle is if you are off the side of the road, in the shade, and the problem is mechanical failure of your vehicle and you have reasonable expectation the AAA will respond to your call from the cell-phone before the local hoodlums come to strip your car of any remaining functional parts.<br><br>bugging in in a vehicle is problematic in many ways. <br><br>If you are stranded on a highway you are in the middle of a large crowd of very annoyed people whom you don't know, your resources are immediately visible through the windows and if they are sizable they might be coveted, your ability to protect is only as strong as your windows, in warm weather this will be quite warm. In an urban environment there are many public places that offer better protection if any stability remains in society where the LEO's will be patroling better than a jammed freeway. If Societal stability is compromized then I would suggest that some place less visible - if even under the last overpass over a river might provide both better shelter from the elements and much better isolation from the less attractive elements in human nature.