Ed, I don't know diddly about Barren, or I'd be more than happy to help you out. But, just looking at the COE info for Barren ... I'd say the lake is real close to having the bottom dropped out of it. It's about 4ft below Summer pool, now ... but Winter pool is another 20+ feet less. And according to the COE pool elevation chart - they drop the lake starting in Oct, and have it at Winter pool by mid Nov. (about a 1/2ft a day drop in water level over the time period)
If the lake is still falling slow - my best guess would be deep brush piles or standing timber in and around creek mouths/points in around 20ft of water or more. If the lake is being drawn down hard - they're probably out in the channels and hugging the bottom.
If nothing else - it may be worth the trip (once they've pulled the water down another 5-10ft) just to see the exposed banks....could be invaluable info for next Spring !! ..............luck2ya ............cp