Sorry I can't help with any fishing advice but thanks for the memory jog.
I lived on the Kona side for a couple years in the late '70's. I'm ashamed to admit that in all that time I never once went fishing.
Back then Kona was a very small (one traffic light) sleepy town. Weather report was "Same as yesterday Bra" and if things didn't get done today, well there's always tomorrow.
Oops, sorry about that. Flood gates and all that.
Have a great time...