The Department of Forests and Waters¹ may also, with the approval of the Governor, make and carry out such plans for the profitable utilization of the dead and down timber and the mineral resources, the leasing of sites for camps, cabins, bungalows, hotels, proper buildings for the accommodation of visitors to and travelers through the park, bathing beaches, bathing houses, boat houses, garages, gasoline and service stations, and refreshment stands or places of such type of construction, as the department shall approve, for periods of not more than twenty years, and such other operations for the profitable employment of such lands as may not be inconsistent with their full use as a State park or pleasure-ground or their full enjoyment by the people and as to the Department of Forests and Waters seems to be to the best interests of the Commonwealth. Any moneys derived therefrom shall be paid into the State Treasury, through the Department of Revenue, and credited to the General Fund.