The group campground at Emma Wood State Beach is called Ventura River and it's about 2 miles south from Emma Wood campground.  It's closed at this time due to storm damage - check the website for updates.

Reservations are required for the group camps. 

There are 4 group campsites for 30 people max - walk to campsite from parking area.  Restrooms and water are available.

There's also an RV camping area (no hookups) for 50 people max, max RV length is 45ft.

There's also a day use area and beach access.  Access to downtown Ventura is super easy via bike or foot.  

Really fun campground and location!  Hopefully they're able to open up again soon.