I don't know a thing about kiteboarding so don't know if smooth water is important or wind or what. I'm assuming wind is...if not stop reading now
I don't know if it's allowed there or not but I would think Monroe would be a good place to go. It's pretty wide open...kinda giant bowl shaped...they have sailboats and whatnot that run out there. I typically stay away from Monroe for wakeboarding due to the shape causing really bad wind chop most of the time. Good luck in your search.