I tend to agree with the two previous posters. In the main lake as the water temperature drops below 65 F the crappie begin to move deeper and deeper along bluffs. Starting out around 25' and then slowly getting deeper as the water temp falls.
In the main creek areas, like CC, they will run 10 to 15 feet during those times moving in tight to the banks at night when it is colder. Finally settling in as deep as they can along the deeper steep bluffs by winter.