A local md'r I used to hunt with back in the very early 1980s here, moved up to the Sacramento area in the mid 1980s. That was about the time the nugget craze was beginning to hit full bore up there. After a year or two, he totally gave up coins/relics, and is now almost strictly nuggets. He's about 12 yrs. older than me. So that would put him about late 60s or pushing 70 by now. He still gets out way back into the boondocks in their quest for virgin tailings piles. Haven't hunted with him for a few years. I think he's currently in the Jackson or Mountain Ranch area.
He tells me that in their quest to find the nuggets, going way back into the old mining districts miles back on dirt roads, that they have frequently come across old ruins. And evidences of old mining camp tent cities. Like one time in the 1980s, they came across a flat, next to some mine workings, that they could tell had been the camp zone. And there was still bottles right on top of the ground ! They gathered up the so-called opium bottles, and told themselves "we ought to detect here for coins". And were going to do it some day "when they had time". But they are sseeoo busy going for nuggets, that they just never end up getting around to coin hunting these days. I guess nuggets are kind of addicting, eh ?
And you've seen Ron's videos haven't you ? He's from the Roseville/Folsom area. He's gotten gold coins, seateds etc.... by searching the old miner-tent city zones.