You've picked the best day of weather for the long weekend Damian! Friday is going to be raining and blowing 25knts SSW, it'll be pretty rough out there with big swells as well.
For the school fish PE6 is more than enough. I've had a few mates land fish to 25kg out there on 16lb braid on pretty much heavy bream gear! Just make sure the rest of your charter group are understanding enough to let you fight the fish for a couple of hours if you're intending to go that light! I'd say min PE4 for the school SBT and Albacore and you'd still have half a chance at a barrel if you hook up in the shallows, out deep you're gone!
My setups consist of PE4, 6 & 8. Depending on water depth and size of fish being encountered. If you encounter a big school, my theory is that even with PE12 with a fish sounding back towards the school any bit of braid touching another fish will end in tears.
Anyway, hope they turn back on again as there was a shitload of boat traffic out there today and the bigger fish have gone missing. By the way, you might want to find out what a 'Heart' lure is, apparantly its the one Winga got hit on today before being cut off by a long liner!