I love this place. We bring our scout troop there to hike the livelong day. You are right about finding trees to hang from. You can only do it at the Doris campground. I usually take my scouts for a night hike out of this campground to a rock outcropping about a half mile away. Then we spend a Saturday climbing in Charones Garden. One time I varied this and we took the 6 mile trail to the east of the garden. It was a good hike, but the boys were disappointed about not climbing up a rock cliff that day. And we kept having to move to the side of the trail as the army guys and girls kept passing as they jogged the trail. One of Oklahoma's best outdoor areas.
And the burgers at the little place just outside of the reserve are a treat as well.
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