I have found before the sun comes up they relate to the structure of the dock. A lot of times they will hold on the outermost pillings. Look for docks with lights over the water. Check in front of and under those for brush or structure placed to hold fish. Those docks would my early morning choice. As the sun gets overhead the fish will move under the docks into the deepest shade. I love to find do ks and pontoons with spider webs under them. Those can be honey holes. Nobody has been fishing them.