A friend and I found an old abandoned school out in the country that looks like a promising site for coins. We did some research online and discovered that the owner lives about 25 miles away, in the city. We found his address and phone number, but we've never tried to ask permission from someone who doesn't live on the property we'd like to detect. We're feeling rather awkward about how to approach this- do we knock on his door and tell him we figured out he owns that property that's miles away, and could we detect there? A phone call from out of the blue also might seem strange. What would you do? Thanks for any suggestions.