Yes, I have found that this hobby tends to reward persistence (read: stubbornness). What I really need to do is grid my backyard thoroughly, and I think a few more coins will show up. Nothing is deeper than 3-4" because of the red clay soil.
Backyard refuses to quit! Nine more coins tonight, no more silver, but found a 1950 D wheat cent. All coins are from the 60s except for the wheat cent and one of the dimes. Two of the pennies were in a spill, giving a junky double beeping signal that I passed on until today.