Thanks plugger.
I know Umdoni Point well and used to jump off there to go get crayfish off the the reef just off the point; that was quite a few years ago when I was a lot younger and maybe a lot more reckless.
At the southern end of Pennington, having a look at Google Earth, I can see some very nice bays near what looks like an old tidal pool.
I will let you know how it goes when I get down there.