I've caught 3 fish on Smithville this summer. General consensus seems to be decent sizes in small numbers and Burton's tourney results usually reflect similar (on Thursdays). I've been told that fishing for bass deeper than 6' at Smithville is a waste of time. I've found many spots at Smithville that seem on paper to be havens that have produced nada... can't figure 'er out.
Some of those thurs & sunday guys have it figured out, though, so there's a way to catch them. That's what keeps me going out there (...that, and, well I basically live on the dead sea itself)