My wife also had this idea of using our long-since outgrown puppy crate (has top and side doors) for holding small stuff and keeping groceries from rolling around. Only problem w/ using a large dog crate is the door would be on the side, so you'd have to use two smaller crates both facing rearward. You could also stack the crates in a 2x2 grid. Ideally, you'd get a crate w/ multiple doors so you can access the gear from the 2nd row seats, so no need to pull over and open the hatch. This is probably the way I'd go.mainecruiser said:Consider a crate. Not only does it keep them contained, but I understand it makes recovery in an accident easier for emergency crews (pull out the entire crate as oppsed to an angry injured dog). It also keeps the interior of your vehicle cleaner. They are about $100.00 at your local pet store.