As used in this article, the following terms shall have the meanings indicated:
All those tracts of land whose primary purpose is to provide a temporary site for a travel trailer.
A vehicular portable structure built on a chassis and designed to be used primarily for travel, recreation or vacation use; with the manufacturer's permanent identification "travel trailer" thereon; and when factory-equipped for the road, being of any length, provided its gross weight does not exceed 4,500 pounds, or being of any weight, provided its overall length does not exceed 28 feet.