You may not have a problem. I always follow the old recommendation - identify the bait/forage and use it.
The only thing I'd recommend is grabbing a shad and putting it on a hook and sail it to an area you know or believe your bass to be. Then enjoy the ride.
Why try anything else? If you see them busting shad, why throw a worm or spinnerbait? They're eating the shad, toss in a shad.
There is a pond I fish, and the pressure is actually very high. A 1 acre pond that has on average 10 people fishing it 6 days each week. That is some pressure. And the majority of these people are using every artificial lure/bait/prop known to fisherman. These fish have seen it all. Because people buy a lure at the local bait shop, walk to the pond, and zip it in. I've fished shoulder to shoulder with guys using $500 setups chucking out $20 lures for hours without even a strike. And I'm beside them with my $40 setup dropping in what I know these bass eat daily, and I'm landing bass, big bass, every day I fish that pond. NOTE that I fished the pond 3 times, using all sorts of lures, not a single strike. The third time I noticed the bass boil and went over, fished out a minnow, put it on my line and within 5 minutes landed a 5.75lb largemouth. Since them I don't waste my time with anything but what I know these bass eat. So for you, I would put live shad on and be happy. Then if yer bored throw in some swimbaits that are very life-like and see how that pans out.
If your bass are eating shad every day, why would they chase anything else, or even look at anything else. They are a few years old, they know what they've been eating, and what they like and it is in abundance in their home. So they're chowing down on the shad.
