HI, I used to live in LC, ran the Econo Lodge Motel, you need to go to Beverly Beach and get a permit to go on the beaches there. Not sure if everyone does or not but I always try to do what is right.
Most people go down by Mo's Resturant, down by the river there, easy find, there is a large paint building on the right hand side at the last light going south out of town, turn right there and go down toward the beach. Lots of parking, lots of shops and lots to eat. People seem to find things but I never found much but it was because I could not always hit the tides. The most minus tide is the best that you can do. -1.1 or like that so check the tides before you go. I also went to the "new" city park by the "D" river wayside. It is fun, found a few native american artifacts, at least I think that they were, there and some coins. Used to be an old hamburger stand there, the foundation is still there somewhat. people also go under the road overpass and sleep in there, found a few interesting things there. Anyway, over on the D river wayside, there are interesting things there too, not much to bragg about but interesting. I know that this is a little late but thought you would like the info.
Just pass the salmon river, north of LC is a boatramp, has great hiking trails, but down by the boatramp, supposedly, there was a ship that sunk with treasure chests, indian area also but never found much there.
The state parks sometimes will let you work in the camp areas as long as it is not an old indian site, have to be really careful in the state parks now, they have to really respect the indian sites.
It is a beautiful place, love the water and the waves on the rocks, been going to Quartzville, once, what a beautiful place also, met a friend and we all had a great time. Going back as soon as I can.
Blessings,
didijim