Nothing in this Act shall be construed to exclude any developed state parks of Illinois or the rest areas on state or interstate highways. Nothing in this Act shall be construed to impose any additional duty of care on an owner of land who either directly or indirectly invites or permits without charge, as defined in the Recreational Use of Land and Water Areas Act, any person to use such property for recreational purposes. Except that the provisions in this Act for applications for permits and licenses, the provisions for fees for permits and licenses, and the provision for fine and imprisonment shall not apply to the State of Illinois, to Departments thereof, or to units of local government. The State of Illinois and Departments thereof and units of local government shall furnish to the Department such information as may be requested by the Department as would otherwise be required for permits and licenses. The terms “campground” and “recreational area” shall not be construed to include buildings, tents, or other structures maintained by an individual or company on their own premises and used exclusively to house their own farm labor, or any military establishment of the United States or this State wherein a recreational vehicle or vehicles may be located or harbored, on any park or State or county fairgrounds for a period during, immediately prior to and immediately subsequent to the holding of a fair or in association with events or activities being sponsored on any State or county fairgrounds, or the area or premises on any farm upon which are harbored recreational vehicles occupied by persons employed upon such farm for not to exceed 90 days in any calendar year in the production, harvesting or processing of agricultural or horticultural products produced on such farm.