I agree, that is a fish of a lifetime. There are many people that will spend their entire lives fishing and may never get lucky enough to hook into and catch a largemouth bass that big.
But I have a feeling that you might be catching more beasts like that in the future.
I live in Oklahoma and have been fishing ever since I could walk. I've fished the Washita River all my life and have heard of big fish coming out of there,