Before we started towing the Suzi, I made a sign using the graphic of a Bounder from the sales brochure, had it laminated and screwed to a stake. If we left our site with the intention of returning later, I would post it prominently in the site. The wording around the graphic was, "SITE OCCUPIED BY A BOUNDER".
On occasion I used the screws to affix the sign to the table or a pile of wood we had at the site.
It was never stolen and no one ever threw it in the bushes and took my spot, I know it could have happened but most folks are respectful and left it alone.