Thanks for your responses guys.
Aaron, yep that was the way I privately suspected would be best when I asked the question, but figured I'd get some feedback before committing to that strategy. The thing is, the areas that I will be fishing in a few weeks time (Whitsunday region) are known mackerel hotspots, and often GTs and spaniards are feeding on the same schools of fusiliers at the same time, so the chances of encountering toothy critters are very high.
Brandon, I can see why you hate those toothy beasts. But the stickbaits I've made for this trip are all floaters, so if I was to take your advice and not use them when there could be spaniards around, well, the lures wouldn't even get a swim!
Cheers
Angus