Kathryn Abbey Hanna Park is a huge park and campground near Jacksonville, Florida. It has about 300 campsites that are very private in a heavily wooded area. It does get very muddy at the sites when it rains but the access roads are paved. The bathrooms are not great, very old and uncared for. There is a lake, camp store, 14 miles of mountain biking trails and the beach is only a short walk from the campground. The beach is long and flat enough to ride a bike on, it is also dog friendly. The park is right next to a naval base so there is plenty of helicopters flying overhead night and day. There is also a surfing spot called The Poles right next to the base.
The beach is very dog friendly, and Ella had a blast. Chasing her ball and frisbee and making friends.
There are plenty of birds, at the lake and the ocean and I saw dolphins most mornings on my beach walk.