We stayed at Doane Valley Campground, campsite #7. The campground has lots of trees so there is shade. Camping and picnic areas are clean and well kept. The bathrooms are well kept and include flush toilets and showers, but make sure to bring quarters for the showers. There are several trails nearby with a great mix of easy and moderate hikes that are easily accessible and clearly marked. Palomar Observatory is only 5 miles up the road. Do not expect cell service of any kind, for us that was a wonderful escape.
Stayed here in late August, it’s easy to get to and close enough for a short trip out of town. The trees were nice, needed some maintenance though because a large tree fell very close to our camp and the area was covered with Poison Oak. The bugs were not enjoyable at all, there were meat bees/wasps swarming all the water faucets and the gnats were so bad we spent most our time hiding in the tent. Had intended to stay longer but the bugs drove us out. The bathroom facilities were pit and not flush so the meat bees/wasps also swarmed there.