Hey John,
I have just got home from a week holiday in Yamba. I fished the wall as well on a few sessions however I did well on bream all around 28 - 30cm and a flathead 65cm on a vibes. We also trolled the wall found taylor and Salmon just for fun.
I did not target Ludrick as I never have fished for them before but I also saw people of all ages targeting them. (How good are the bike set ups with trailers and rod holders all over them). I stayed at the Blue Dolphin which the kids just loved and on our drive home we stopped at Port Macquarie for a 2 night stay and it seems to me that Port loves Ludrick fishing as well in Pelican Bay along the breakwall.
If you want a good feed with a great view over lunch try the Yamba Hotel above the beach it has an awsome view, great food and beer.
Have fun I just love Yamba but next time I really want to go Snapper fishing I saw many big frames at the boat ramp cleaning tables.
I'm back to work tomorrow but fortunately for me I'm doing my South Coast country trip which means I'll have to take a rod and get a couple hours in down Narooma and Merimbula. (Now I wish i knew how to Ludrick fish!)