Curious what type of rig/bait are you using for them ? If you aren't already, you may try a Texas rigged floating jig head tipped with a minnow or creek chub. I have better luck with the chub minnows & the larger ones at that. It's amazing how big of a bait those sauger can inhale. I'm a regular at Meldahl thru the winter. Tough bite now down there now. I fished yesterday and had 2 others just down from me and never saw a fish caught in over 4 hours.
But at least the sun was shining & I was fishing.