Something else you might think about if you want big bass is stocking additional forage species such as threadfin shad and golden shiners; if you want the biggest bass possible I'd stock both. You could also stock crayfish, but make sure not to stock the rusty crayfish as that species burrows.
Where is Eads, TN? I could come take a look at your pond and help you figure out what's in it, come up with a plan, etc.
