Just south of Palomar Mountain Observatory (a must visit) Fry Creek is a heavily wooded (oak, fir, pine) campground in a narrow valley surrounded by steep forested banks.

The campsite is really an extension of the Palomar Observatory Campground across the site with a shared camp host (who pretty much sucked during our visits). That site is much better for stargazing, but this one is just as pretty especially in the fall with changing oak leaves. All of the sites are heavily wooded and in a valley with steep walls. That's important because it seems to amplify sounds from the other campsites. No matter if you have good camp neighbors but if your camp neighbors starts setting up a portable chainlink fence for a cadre of dogs they are training...There are some more segregated sites near the back of the camp loop.

There are bathrooms and showers (peak) and even though the sites are near each other they are really private. They each have fire-pits and picnic tables. The sites are decent sized with nice flat spots for at least two tents.

There is a decent hike that loops around the camp with plenty of elevation changes and incredible forest smells. The trail is fairly easy to follow and despite being short is moderately challenging. It takes about an hour at normal pace. Head across the road and you can take the trail all the way to the Palomar Mountain Observatory. It's meandering and plenty of elevation changes. At the top the Observatory Museum has nice bathrooms open to visitors. The museum is free.

Campsites are $15/night.