My student, Gil, is amazing. He hits it as far as Bubba yet it looks effortless. Some of that has to do with "youth." But, no matter your age, the secret to the long drive is "lag." The more "lag" you can generate the longer the ball.
Check out this video tip. See how Gil develops lag. It's the legs, not your age, where you get lag and long drives.
Enjoy the game again,