Paula

If you have a camera bag big enough to hold your camera with lens attached, you can simply put the combo in the bag with the bag on the front passenger seat. I've done that a lot in the past. Similarly, if you have a hard case, such as a pelican case, you could have that on the front passenger seat with the camera and lens in it and ready to go. I've also simply had the camera and lens laying directly on the seat with the foot turned so it's in the air. I have it laying so the body is near me, end of the lens pointed towards the other door, laying flush against the back of the seat. This makes it easiest to grab, least likely to move as it's as most in the V of the seat as possible, and if you angle the foot right, you can make it not roll at all. It still wouldn't help for slamming the brakes at high speed or an accident, but normal travel, even on a dirt road should be fine. Hope that helps. :)