Three miles from a the grocery and only minutes from north LA, you'll find a basic campground with flush toilets, coin showers, and easily accessible hiking trails. The sites are basic with campfire pit and grill, open space for a tent or rv, and picnic table. The inner circle of sites abuts the bathrooms and is better for groups. The outer rings on three sides have nice views, but some sites on the south side are shorter and abut a fence.
We stayed in site 59 which had a really nice shade tree and great views of a meadow and the cliffs out the back of the site. The sites are fairly open and close to each other, so be prepared to hear everything, and because the campground is close to the city it is popular with groups and families.
The campground was under fire warning all weekend, but faux wood (javalog or duraflame) and charcoal was still allowed. The camphost sold Javalogs, and there were plenty of options at the nearby Albertson's.
The state park is a former movie set and is filled with easily accessible trails for hiking and some for mountain biking. The primary trails were open fire roads with off-shoots to lakes, pools, meadows, and more. It was easy to imagine you weren't anywhere close to the city. During a holiday weekend the trails were fairly busy with day-use hikers, but even then, it was easy to get away and be on trails alone if you wanted. There is also a visitor center in the park, but it has limited hours.
The wildlife is abundant. There is plenty of birdwatching, and coyotes were wandering through the park and campground without fear. If you have a dog with you make sure they don't try join the pack. On a hike right out of the park a few hundred yards, I came across a pair of bobcats—mom and cub—making their way to a running creek.
I'd recommend a visit if you're looking for a close to town escape.