I know the lake and owner (Paul) well a cracking lake with some supper fish.
Listen to Paul he is a VERY experienced angler would be my first tip and fish with the bait he makes on site.The fishing is not the easiest in the world and the fish can move from one end of the lake to the outher in no time,the bays always seem to hold a few fish sometimes a lot try and try and find little places that are tricky to get a bait to and you can find a good few fish helled up in very small spots.
Good luck
Tell Paul Neil the fish farmer said 'Hi'