You are incorrect in your assumptions. You make the common mistake that Weeks Act Purchase Units are National Forests. They are only administered by the Forest Service. More research of the actual laws (Weeks Act and Organic Act) will clarify your error.
Looking to the executive land management agencies to interpret those laws will lead you astray. Those agencies are not legally responsible and can not be held accountable for their misleading statements. You will need to do some work to uncover the truth of the matter.
I am working on some rather complex maps for Land Matters that will finally reveal the facts of the matter for those who can't, or don't have the time, to do the research necessary to discover the facts.
I'm not mistaken... I said it doesn't matter where they are located in regards to metal detecting. I'm fully aware of the history of how the lands in the East were acquired.
The Weeks Act - USFS History - Forest History Society
The National Forests in the East are managed by the USFS and the USDA, that's what on the signs, the rules and regulations are posted onsite and online.
"Welcome to the official Wayne National Forest website" Wayne National Forest - Home
Now lets compare recreational activities from several National Forests across the Country...
Clearwater National Forests, Idaho
Nez Perce-Clearwater National Forests - Recreation
Ashley National Forest, northeastern Utah and Wyoming
Ashley National Forest - Recreation
Cleveland National Forest, California
Cleveland National Forest - Recreation
Sumter National Forest, South Carolina
Francis Marion and Sumter National Forests - Recreation
Fremont and Winema National Forests, Oregon
Fremont-Winema National Forest - Recreation
Monongahela National Forest, West Virginia
Monongahela National Forest - Recreation
Wayne National Forest, Ohio
Wayne National Forest - Recreation
And for good measure and extra credit... El Yunque, Puerto Rico
El Yunque National Forest - Recreation
I don't see any difference between the East and West, I can camp at either, I can hike at either, I can have a picnic or whatever. Detecting is prohibited in areas and in some forests all together.
I think you misunderstood the point I was making to Tom, metal detecting is permitted on USFS land unless otherwise prohibited. A prohibition will be posted onsite and online, I've checked personally.
The difference between the Western forests is if the land is open to mineral entry then a loophole exists for prospecting with a detector. Whereas metal detecting is prohibited for recreational use, it is considered a legitimate means of prospecting for gold.
From a recreational standpoint there is no difference and that is what I was getting at. It doesn't matter how they came about, what matters is what is permitted.
"Like all national forests, the Weeks Act national forests are managed by the U.S. Forest Service as working forests"