Tim,
I detected over at White Pines back in 94 or 95, that's where I scored my first two Standing Liberties (if I can find them I'll scan them). That's back when my family would go there every weekend it seemed. You had to get a permit to detect, if I remember correctly, but no one else seemed to want to do it at the time. Oh well. Anyway, there were certain areas off-limits to digging, I'm guessing nesting or breeding grounds for endangered species, or areas containing rare or fragile plant species. Those kinds of areas should, in my opinion, should always be left to nature...but that's just me.
Joe