Nebraska I know has a law that protects the land owners. Nebraska Recreation Liability Act (Sections 37-729 to 37-736)
37-730. Limitation of liability; purpose of sections. The purpose of sections 37-729 to
37-736 is to encourage owners of land to make available to the public land and water
areas for recreational purposes by limiting their liability toward persons entering thereon
and toward persons who may be injured or otherwise damaged by the acts of omissions
of persons entering thereon.
37-732. Landowner; invitee; permittee; liability; limitation. Subject to section 37-734,
an owner of land who either directly or indirectly invites or permits without charge any
person to use such property for recreational purposes does not thereby (1) extend any
assurance that the premises are safe for any purpose, (2) confer upon such persons the
legal status of an invitee or licensee to whom a duty of care is owed, or (3) assume
responsibility for or incur liability for any injury to person or property caused by an act or
omission of such persons.