i did the same trip last november. actually we departed on the 20/11
the boat does about 6-7kn when cruising. perfect speed to throw out a few rapala CD11's. we got a few spotted macs doing this.
there will be hords of mac tuna so take small profile metals and chase them down in the tender provided. most schools we found were in cid harbour and out the front of hamilton harbour
there is a creek at the back of cid harbour (dugong i think)........cast sp's or bait onto the coral drop off for coral trout, spangled emperor, sweetlip and all types of cods.
the creeks on the south end of hook island (nara & macona) are good for chasing fish in the shallows
if they go to hamilton harbour, tell them to fish off the back of the boat. got some good estuary cod, goldspot cod, tusk fish, small gt's, grunter and more.
and tell him to take heaps and heaps of beer its needed