Gryffindor1: The cache is absolutely not on private property according to the Niagara County land parcel map - I made sure of that when I placed the cache... however, if someone perceives the land as being theirs, there's no point trying to fight it - I'm sure they would give cachers a hard time despite the fact they don't own the property, so I am archiving this cache.
It's a shame because it's been there over five years... Thank you to everyone who visited!