Go in the evening from 5pm onwards till you can't see your float.
Use 4-6 lb mainline, and fish 13 feet down with a 3 gram float via float stopper, single 5 or 6 split shot, and about a meter of 3-4 lb leader line. I got 27 fish in June one day this year. It's not so much what you have on your hook, but rather where you put it. Cast on rings, look for swallows that swoop around for insects, the swallows and the trout are in the same trophic level and feed on the same insects. If you see lots of surface activity, fish around 7 feet down. I often catch fish inbetween the 2 floating docks on the bridge casting towards the beach only a few meters in front of me.
see you out there,
jon