I grew up fishing a tidal brackish water creek. It was my experience through the years that the best fishing was low tide, with water coming back in. For some reason, the fish seemed to be more aggressive when the water was coming back in. Further, the water being low would concentrate the fish. Conversely, we never had much luck if the tide was high and going out.. Just never caught much that way but did notice more top water activity as the red fish were present at high tide. I remember catching a 5 lb. red fish off the bridge using a live shrimp, then catching a 4 lb. LM bass under that same bridge the next afternoon at low tide. Take that info for what it's worth. Hope it has been of some help.