ORS 801.180: “Camper.”

“Camper” means a structure that:

      (1) Has a floor;

      (2) Is designed to be mounted upon a motor vehicle;

      (3) Is not permanently attached to a motor vehicle upon which it is mounted;

      (4) Is designed to provide facilities for human habitation or for camping;

      (5) Is six feet or more in overall length;

      (6) Is five and one-half feet or more in height from floor to ceiling at any point; and

      (7) Has no more than one axle designed to support a portion of the weight of the camper.