Steve,
I purchased a LED navigation light on line at (takes a week or so to receive from order date):
http://www.ledshoponline.com/FLUX_navigation_lights.htm
It needs a conventional masthead type waterproof cover assembly which has to be modified to suit this larger LED. Get this at Boronia Marine or similar.
Power consumption is only 3 watt compared to the conventional 10 watt globe and the LED is a lot brighter. You need to run wires/switch to your battery which a lot of people don't like to do so they go with a self contained light (battery and globe together - like a torch) which then mounts on the yak.
The LED light is advertised as lasting 80,000 hours, unless it falls overboard on the return paddle! (this is why I had to replace mine from last year).
I don't know if you know in detail Pt Leo. I've been there a few times and can recommend what I think is the best access point. I'll scan the map and PM my suggestion to you. Also I'm interested into which direction from Pt Leo we would be heading out.
Sat. is looking good weather wise. The swell is predicted to be "solid" however at low tide the launch area is well protected (high tide = different story!).