Sounds like you have a nice place. I would hire a shock boat for a day or two and use it to reduce the lmb numbers. It will also give you a better look at what u have. Overton's Fisheries did my shock along with recommendation on where to go after analysis. I would also use tilapia before I used Gizzards. Not saying gizzards are out of the question later on but for now I would use the tp and that would take some pressure off the Bg and the Tfs.