Ours says something like that. If I'm not mistaken its 150 though. It's there for the accidental shooting, so they don't get sued. They've seen some of our shooting houses that are closer and haven't spoken of it. The roads statement is there also. It's referring to not screwing up the roads with 4 wheel drives after a rain. We had a logging crew that just finished up and WE approved the roads. The water bars were to steep to get a truck over when they "finished" the first time, so they came back and dressed them up some.
I'm not telling you not to follow the 250 yard rule, but I would ask about it. A 250 yard perimeter around the whole place would be a lot of lost huntable property. I wouldn't pay for it if I couldn't hunt it.