When we did that, I gave them my business card and put one on the dashboard. That way they KNEW who owned THAT car. I inquired if they wanted a phone call each time the evening before or just before I got there and where to park. I ALWAYS found the time to drop off a plate of cheeses to the 'Mrs.' for every time I fished; seemed to play well. I kept all gates as I found them and if they raised sheep, reported exactly any burdock I found.