hope you don't get your dad in trouble...
Unfortunately, that seems like the most likely outcome.
Look at the situation from the property (radio station) owners point of view. He probably doesn't give a hoot whether you shoot on his land or not. But he probably does not want a confrontation with a neighboring property owner over guns. Why would he want that headache?
In addition TV and radio companies are notoriously media-shy. It seems odd to say that, but every time their license comes up for renewal, they are scrutinized for "community relations" - I forget the exact phrase. They really don't want problems with that.
If the deer hunter complains to the owner of the property, then I can't imagine the owner doing anything other than calling your dad and saying, "I don't need this hassle - stop letting your son and his friends shoot on my property."
If the owner didn't specifically give your dad permission to allow shooting on the property, then it's likely he will yell at your dad.
If you want to keep shooting there, you have to find some way to coexist peacefully with the deer hunter - and he doesn't have to find a way to coexist peacefully with you. Your use of the radio station's land is probably contingent on his acquiescence - his use of his deer hunting land is not contingent on your acquiescence.
Winning the confrontation almost certainly mean losing the war.
Mike