The altitude doesn't bother me, I wouldn't be planting a victory garden there. I'd die of starvation if that was ever the plan. I'm sure you're right about the neighbors knowing about the bunker, but my intended use of the bunker is more for cool storage for food and ammo, unless there's a moisture problem. I'm sure it's pretty small anyway, and unless a nuclear bomb was on it's way in, I don't think I'd ever hunker down in such a thing anyway.