I only have experience below Percy Priest in Nashville and below Ross Barnett in Jackson, MS.
Both places it's 100% about heavy flow from gates. In Nashville, I would get the generation schedules from TVA and get there to claim a spot as close to the dam as possible 15-30m before generations starts. I prefer large bucktail jigs with a soft plastic trailer. Throw right where the crazy swift water meets an eddy or calmer water. Heavy line, lots of it, because when you hang into a big striper, he is going into the swift water and will spool you pretty quickly. Be prepared to fight him and walk downstream along the rip rap. Try to get him in quick so he has a chance to survive after release. My biggest landed was 35lbs, but I was spooled by a couple that had to be in the upper 40s. There are also some big hybrids there, my biggest was 15lbs.
Below Ross Barnett, it's all about rainfall in the spring. Get 8-10 inches from an event, and all the gates open. I would put on chest waders, the parking lot was underwater, park on the dam, walk down into the flooded parking lot then go to the submerged picnic table on the west side and stand on top of it. Cast toward the dam through the closest eddy, I used 4-6in soft plastic swimbaits with half ounce heads I poured myself (fish there were much smaller than Nashville). My PB striper was 22lbs there, PB hybrid 10lbs. But it wasn't unusual to catch 100 fish a trip. I had a run back in 2001 where I caught over 500 hybrids and stripers in just 5 days. My thumb was a bloody scraped up stump from lipping so many.
After I retire, I will def hit the trailraces in east TN. Big stripers in tailwaters are a BLAST.