three year puzzle [long]

Hi all--
I was just thinking about the up coming season and a puzzle that I've
wondered about for 3 years.
Three yrs ago I found a spot [honey hole] that made me think I'd died and
gone to heaven.In the space of a couple of hours I must have caught thirty
bass.Most were 12 -15 inches but a few larger ones also .Like all anglers I
go back every time I pass it and have never caught more than a couple of
dinks . My graph shows a ton of fish holding in the area but they just
won't work with me.The hole is a oak tree that has fallen in 12 ft [trunk]
and the limbs are hanging over a 20 ft+ sheer drop off . What success I've
had has been with a watermelon 4 in senko wacky rigged but I've tried just
about every thing. It was late September when I found it. I have found
several other place similar to the first hole and they all hold fish but
are hard to catch.Again I've tried just about everything I know to try .What
do I try next??
Thanks for your time
Ken Blevins
By the way ,I've never tried DS ing