A lot of the time the larger fish hold deeper than the small ones, start using lures like threadybusters that can get down on the deep corners of the creeks and pinpointing large fish on the sounder and jigging plastics or vibes on there nose and you should get some larger stuff, at times the bigger fish can also be up in the shallow snags and available on a wider range of lures but thats worth a shot to mix it up.