Check local by-laws, You are on private property, and yes, let local law enforcement know, perhaps even close neighbors. Only let adults play, 18 plus, and describe the risks to them, environmental, weather, wildlife, etc. If you have a ton of people you don't know, or youth playing, then the farm will need insurances, waivers, etc.
ďREALITY IS LIKE A STONE. TO MANY ITíS HARD AND COLD, THEY CANíT HUG IT OR EAT IT, IT ONLY FRUSTERATES THEM AND DOESNíT DO THEM MUCH GOOD. TO OTHERS ITíS STRONG AND DEPENDABLE, YOU CAN BUILD WITH IT, BUILD UPON IT, OR WORK WITH IT, ALSO USE IT TO SMASH PEOPLE IN THE FACE.Ē