RE: Men, I need your help
Kind of joining this one late -- you say they are foresters, which to me means that they are either state or federal employees. If there is too much “local politics” for the sheriff to do anything, then the state attorney general or the national forest service IG could make life real unpleasant for these guys.
My advice would be to try and handle it locally – as others have described above. But if that doesn’t work, then try going to the appropriate state or federal authority, as appropriate.