@Mongie -
Not an expert on Bettys, but fished there a couple of weekends ago for the second time, and saw plenty spotties come out on main beach.
I found this excellent thread by Craig3007 at the following link (if you scroll down) - extremely helpful in accessing the spots as well as which spots produce what
http://www.sealine.co.za/view_topic.php?id=102564&forum_id=1&highlight=bass+street