I did basically the same. Moved from Wisconsin to a remote part of eastern Tennessee. Even should the bad guys arrive, my house is floating on a lake so they need to get past my "moat".
When I lived in Seattle, I had a custom license plate frame that said, “Mercer Island. World’s biggest moat.”
I lived a couple of blocks from Paul Allen’s house. Lake Washington really could serve as a sort of moat for that place.