If you were charging for entrance / field fee's you would need to register the field as a business.
For legal reasons I'd suggest you only invite private persons that you know and trust. If you post public flyers, you on going to want to get a lawyer to writer up a waiver covering anything and everything that could happen, you'll also want to contact an insurance company to cover you in case of liability reasons arising from injury / etc related to the public using your field.
Basically; while it may be private property, you are responsible for everyone's safety that you invite onto the field. If someone slips in your driveway because its icey, loses an eye while playing without proper eye protection, or decides its a good idea to use their zippo to heat up their propane tank... You'd be responsible.
Originally Posted by autohandgun
also if i was to post flyers advertising this. If the cops saw them can i get in trouble.