I am pretty suprised, you can never go wrong with crawlers, and you're lucky to be in a state were you can use bluegill, they are usually an awesome bait for BIG cat's!! I have never used Charles Dip but Danny King makes a great "stink bait" I have caught many cats with!
If I had to bet I would say it's more the spot your fishing then the bait. Your fishing a great time of night with solid baits, I would try switching up your spot!
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