One of my shirt tail relatives has a ranch in the Sierra foothills near Fresno. Lots of native inhabitation evidence. Pockets in the granite where they crushed acorns etc. Compared to the plains it was nirvana.
They were fat.
Living off the land.
Had damn good weather too. I doubt any of them had a good coat or heavy shoes. They moved up and down the elevations as the seasons changed. At bottom the Central Valley RARELY dropped below 30deg at night. And summers in the mountains rarely exceed 90deg. Water, fish, game and native plants and trees abundant in every direction. Tule elk to 500lbs, to 3 species of deer from 70lbs to 200lbs. Slabs of Salmon exceeding 40lbs. And a single Valley Oak dropping a ton of acorns. Berries. Greens. Mushrooms.
They had to be aware they had found paradise on earth. Imagine California circa 1500. If you try, you can. There are still vast swaths of native habitat. There are even a few wild rivers left.
So much abundance I can’t imagine them being concerned about a few families moving in from elsewhere. Probably just seen as new blood to breed with.
I don’t know if they were as martial as the Plains and Northeast Indians. We didn’t learn any of that history.
I do know the early Spanish missionaries found them essentially docile.