Saltfork is located about 45 minutes from my house, and makes for the perfect overnight trip.
There are tons of things to do, and lots of space in which to do them. My favorites includes hiking trails, and the lakeside dog park.
I stay in the primitive camping, it allows for more privacy and quiet. Although it also means you are relegated to the pit toilets. I personally don't mind them, but I know some campers will make the drive to the nicer shower house in the RV heavy side of the park.
Each site has a picnic table and fire ring, the fire rings in the primitive section need some work, as the grates are very old and small.