There is also Don Carter state park. While I've not camped there personally, i've heard it's nice from friend who have as well as reviews online. You can now do site specific reservations online.
We like Sawnee USACE on the south end of the lake. Used to be one of the few to remain open all winter but apparently not this year(closed even before the shutdown). Most of the USACE ones close early and open late. Also, the shutdown may have closed all of them so you'll have to research it well.