I see two things on (or about) your property that are conducive to squirrels: Lots of big trees, and arial power lines. In my 'hood, we have neither. That is, neither big trees, arial power lines (all burried), nor squirrels :( I was here for a while before I noticed that we didn't have any squirrels. And it must be due to a lack of "habitat". Five miles away, there are plenty.