Most people flock to the nearby Lake Almanor or Butt Valley campgrounds, so Yellow Creek Campground is a nice place to go to escape bigger and busier spots. Nestled in the pines and bordering the Humbug valley, this campground has some of the best views in Northern CA.  It's off the beaten path a bit. About an 8 mile trip down a gravel road but very well maintained and easy to get a smaller RV back in there if you like. There's a natural soda spring on the entrance road where the local indigenous Maidu used to gather and drink for healing.  https://www.outdoorproject.com/united-states/california/soda-springs-historic-site