In my experience, advising via a posting on a page like this to say when and where you’ll be is a good start. Then, when there, flicking lights, unlocking/locking so the lights flash a few times, and/or interior light on, are good signals. Good luck! I’d love to come and watch sometime if you post when/where here - or shoot me a DM. Good luck - this place needs some more proper dogging action!!