I've been catching hybrids up in Hickory Creek. I head upstream from Old Alton and hit all the pools between the ripples along the way. Yesterday they were packed in heavy near the railroad tracks. They've been between 12 and 24 inches. Had probably a dozen over 18 inches the past few weeks.
Pulled this one out where the creek runs parallel to Hickory Creek road a few weeks back when I walked in.