Nothing in this article shall be construed as prohibiting access over any road or trail in any such area to any land to which any person is entitled to possession by such person or any person authorized by him to use such road or trail as a means of access to the land; provided, that none of the motorized vehicles or aircraft mentioned in Section 10740 shall be used by any person as a means of gaining access to the wilderness areas for the purpose of hunting or fishing. Nor shall anyone having a lawful right to enter a wilderness area with a motorized vehicle or aircraft fish or hunt while within the area after having entered the area with a motorized vehicle or aircraft.