Dog fence when sitting outside camper with dog

Despite the naysayers on this thread, we've been traveling with a pet fence since 2006. It's basically 3 sections of X-pen that's 42" and one section under the rig that's 36". My daughter's Golden Retreiver and Puggle were fine in there, but I wouldn't let them out by themselves.

There are definitely parks that don't allow pet fences and that's just the way it is. But many, many more allow them in my experience than don't.