Like gold, silver is where you find it.
I've found silver in every so called pounded park except for a couple parks.
How old is that park? Does it have at least a turn of the Century history with hoards of people?
I have an old park here that is similar to the one you described with a rich turn of the Century history. 3 years ago when i first searched it i found nothing but clad. Next couple times out same thing some clad and the last time, skunked completely. Gave up on it thinking it was indeed hunted out.
A few weeks later i passed the park on my way to do errands and happened to have my detector with me. What the heck, why not?
Searched the perimeter of the park near the woods. Found a silver ring and a few wheats that day.
To make a long story short, over the last 3 years i pulled out 70+ silver coins out of that park. Many Barber's dimes, 4 Barber Quarters, one Barber half, a bunch of Indians and a whole lot of mercs.
Many WWI and WWII medals, cool brass Chalmers model T key fob medallion, rings, old brass lipstick cases, boy scout tie clasps, etc. were found there too.
This park has been my most productive and still stubbornly gave up 7 more silver dimes last Summer.
What changed since those first few times where i only found clad?
-The first few times out i searched the wrong areas of that park with heavy discrimination and auto sensitivity. The area where the modern crowds congregate today.
The park is loaded with pull tabs and is a corroded nail grave yard.
-The majority of the silver coins were deep with iron nearby, likely the reason they were walked over. In fact one area of the park where i found most of the mercs and Indians, the coins were anywhere from 8 to 12+ inches deep. Found some clad in this particular area, the deepest of which was about 3 to 4 inches. Then no coins until i got to the 8 inch depth. There is a coin dead layer from about 4 to 8 inches. That tells me the park was filled a few decades ago.
- After finding my first silver coin which was deep, i changed my strategy mainly settings to get rid of discrimination and ratcheted up manual sensitivity. Also my NEL Tornado coil didn't hurt either. With all the iron in this park and the remaining coins deep, yep a lot of iffy signals but most paid off.
There's another park here with a similar rich history where i only found a few silver coins in the last couple years. This park with its past history is a popular detectorist hang out and accordingly most of the oldies have been harvested. One day early last Summer i searched this park again knowing i probably would only find a handful of clad. Even the clad is scarce in this park.
I started a thread a while back on the eTRAC forum descibing my 'out of the box' strategy that day.
There's an area of the park where hi voltage towers cross the park. I always stayed clear of this area because the intense EMI made my detector next to useless.
It dawned on me so did other detectorists.
So i dialed in my detector settings to minimize EMI effects and to my surprise right under those high tension wires i found a seat'd dime in excellent condition. Last Summer, under or near those towers i found two seat'd dimes, 3 Barber dimes, 4 mercs, 7 Indians and a bunch of wheats. Most of these coins because of the EMI were iffy signals at best.
Whats interesting is i only found a few clads in this area and all were fresh drops. That suggests other detectorists who did search this area in the past only got the shallow clad and disregarded the deeper iffy type signals. Or their detectors had serious issues with the EMI and could only get the shallower keepers.
Sometimes you just got to think 'out of the box'
bookmarked for a couple of readings to absorb the 'strategy thinking hunt' you employed! 
I've read a lot of posts, trying to figure out a hunting style for success, so a guy needs to take notice of ironsights advice and experience here, freely shared!...
I'd wet myself bloody stupid for a Barber Half!
