Sandy has a bumper pull trailer and says the camp area is moderate in size for big rigs. Lots of water and shade. Redwood forests, rolling golden hills, beach riding, etc, etc, etc. Spectacular views of the Pacific Ocean, San Francisco, etc. Park district boundaries blend together and you can ride for miles and miles and miles.
Maps are very good for all areas.
Most trails are well marked. No dogs on State Park and National Seashore trails. Dogs okay on leash on Marin Municipal Water District and some Golden Gate Nation Recreation Area trails. You cannot leave your dog at the campground while you ride, so leave your dogs at home. Popular mountain bike area.