What hp have you got on the back? South bay near the rocks is best for blue cod. Terakhi, kahawai perch etc further out in kaik. Havn’t had much luck at wainui on that point but there is a mussel or salmon farm worth looking at towards the heads on that side. For us in canty it pays to check out the surf websites especially in winter to see whats poss abd what areas are protected. Swap sides on banks peninsula with N or S swells. Same with kaikoura point, so south bay isn’t your only option. I’d be keen to head out with ya somewhere in the next holidays as they’re similar to uni, but i’m enjoying the ski season for the moment!