Wow, that looks like a very beautiful area and a huge pond too! Your best bet would be to contact Dept of Natural Resources - they may have some insight into this type of thing. http://fwf.ag.utk.edu/. Worth a shot.
That is not true cause I personally have hogged (that is what we call it)
several over 50 lb flat heads and several hundred under 50 lbs. Its just a matter of having a place where they can't escape, ie: hollow log, under rock
or car bodies.