The ramp on the north side of the lake bridge (windang rd) has a good parking area, cleaning tables and toilet facilities (that even play music!). Get there EARLY esp weekends for a parking spot.
There is a ramp on the south side next to the breakwall. Parking, no cleaning table but covered bbq close by with a tap. Toilets not so close. This one is more sheltered from southerly breezes, but is a very popular land based spot, so watch for lines and the odd swimmer or two.
Once on the lake, a slow drift around the flats between the breakwall and the bridge should see some flatties or whiting, and the odd bream near any weed banks. Further in, try the channel on the other side of the bridge, further up near the islands, or around the corner try the drop-off near the channel marker.
HTH
(gee I miss my boat!)