It is good to get it narrowed down to smaller than a football field, that is for certain! However, it might help you if you can get him or the owner to move a lot of that surface metal to another site....removing trailers, tin roofing, etc, might open those parts up, unless they were there 40 years ago! HA HA. Anyway you go you should first go over it yourself with the detector to learn where the real trash zones are. A quick once over, and pick up any surface trash you can see, like aluminum cans, pull tabs etc that are actually exposed to daylight! Most gold hunters I have talked to first clean the area of silver, aluminum, and iron, before they start seriously looking for that grunting gold and nickels. Ask the fellow if he has a similar sized gold ring now, so you can at the least get a starting point with your machine! There is no telling what you might find out there...silver coins, pocket knives, tools, etc since it was a working farm back then!
I personally hunted a friends yard for him after he told me he lost his wedding band in it ....small yard, I hunted the entire thing, and found some loose coinage, but no gold band, but one high pitched tone, not gold, but likely silver, was under a fair sized rock in his newly installed walkway. I wanted to move the rock to see what it was, but he said if it is not a gold signal forget it. I still wonder about that strong signal! HA HA
I personally hunted a friends yard for him after he told me he lost his wedding band in it ....small yard, I hunted the entire thing, and found some loose coinage, but no gold band, but one high pitched tone, not gold, but likely silver, was under a fair sized rock in his newly installed walkway. I wanted to move the rock to see what it was, but he said if it is not a gold signal forget it. I still wonder about that strong signal! HA HA
