Look what Mike had made for the little trailer we pull behind our SUV when we travel. He had one made for each side. We have been taking the trailer with us so we can fold down the rear of the SUV and the x-pen fits back there and the dogs are not trying to climb on our laps. It's like having one big crate for them. We put potty pads and their beds and a few toys in there and they travel so well. Then we can fit our luggage, our bikes and the dogs bike cart, stroller, etc etc in the trailer. haha since the SUV has a DVD player, we can put in the "doggie babysitter" DVD for the dogs to watch back there too!