Originally Posted by MaryC
We have several x-pens and made a big corral around the door side of the trailer, spanning the length of the trailer and pretty much covering our large outdoor mat. We had a short puppy height x-pen and we cut a panel down to fit behind the trailer steps so that is all secure.
Very nice! The only downside we had to this on our last trip was the edge of the pen touched the trailer and made a little rub mark. I padded it with some cloth, I just need to remember to put a little bumper wherever it touches the trailer.
Carmilla, I can't imagine anything you could permanently mount and then expand. Even an X-Pen is pretty heavy.