Yes, as others have already said, the spot's yours! I was offered a particular location by Dave of The Wombles when he archived a cache of theirs, as it's very near my home, but if anyone else had got in before me there would have been nothing I or he could have done about it.
His cache was a traditional, and I set a multi, which meant that people who'd done the original saw parts of the area that they wouldn't have seen before. It sounds as if your location is suitable for a reasonably-sized container, so you might want to think about making yours a multi - a lot of people don't like micros in places where it's possible to hide a regular container.
Do not go gentle into that good night.
Rage, rage against the dying of the light. (Dylan Thomas)