Thank you GKL! I usually find at least one silver, most likely a Silver Rosie or Merc dime, in a private yard, along with wheat pennies and other stuff. My best yard this current year yielded 6 silvers, the usual yard has a couple of silvers, many yards have 3-4 silvers. My best day this year was up in Missoula, with 11 silvers (found both in curb strip and yards). And fairly often I will be surprised with a Barber dime, quarter or half, or a Big Ben or a Walking Liberty Half! To get to 220+ silvers this year, I probably have detected 80-100 private front yards. I usually don't ask to check the back yard as at many of these homes, that is the "private" fenced in area and I want to respect the owner's privacy.
I have learned to recognize yards with replaced turf and added topsoil, sometimes I don't even bother to ask when I see the grass/dirt is 8" higher than the front sidewalk. Once in a while I do ask and check, and usually after 15 minutes of detecting and finding 7" copper pennies and 5" zincolns (and nothing old), I know what was done to the yard. The best yards are where you can see that the grass looks original and is about the same level as the original sidewalk or perhaps an inch or so higher. Those yards I am eager to detect as there is a high probability of something good!
I have detected a few yards that have previously been hunted (before the current owner lived there), they looked juicy but someone else got there first. An absence of anything old even though the house is old is the clue there. Yes, I do get "skunked" in some yards, but the vast majority of the time I find silvers, at least one, in most every original, undetected yard.