I know that they're being released in the area , but I've never seen one. That's the main reason that I clear as many greys as possible.
I took 25 greys from my feeders in jan/Feb, and didn't see any more until I spotted more on the trail cam a couple of weeks ago. I had three last Saturday, and two more have turned up on the cam this week. Hopefully I'll get lucky, and clear them up tomorrow.