Sixes River up off of HWY 101 has a BLM Campground located right on top if an old Placer Town location. Gold is always available but recent rules make it difficult to get it. No dredging. No motors, such as gas vacs.....although 40 years ago I would run a generator in the campground and run an extension cord to a shop vac and vacuum up the above waterline crevices. Then I would run that material through a sluice I had set up in the creek. Not sure if they categorize that as motorized placer mining. I know people camp and use generators within 100 yds of the Sixes River....as many campsites are located in close proximity. Now; the rules don't allow one to dig into the riverbank by hand. Kind of limits the ability to get gold when one can't do much. But if you should go to the Sixes River, there is a skid trail with a cable across it below the entrance to the campground. That trail takes you all the way down to the bottom of the BLM land and out of the everyday hit area. That is the best place to go for some really good gold.
Also:
Cow Creek above (west out of) Riddle and also further up between Riddle and Glendale.
Bejay