Yep. Hawaii has hog issues. Mostly considered a pest but provides meat for subsistance hunters. Most guys here go dog and Knife. What kind of hunting were they doing in the article? Seen some monster boars on backs of trucks. When i went dog and knife the dogs killed a small chute(sp) no big ones but there up there. You planning a trip? If so what island im pretty sure every island has um. They just started bringing in guys from new zealand to kill goats and hogs from helicopters which dident go over to good with the locals. hope this helps if you have any more ?s let me know i might be able to help you out.
If you're lucky enough to be on private land and can leave your stand up during the off season you can tie an old piece of cloth or something of the sort to your stand. I like to use an old camo bandana that I have. That way the deer get used to the movement and eventually don't bother even looking up when there is slight movement. This may just give you the time to draw your bow or raise your gun without being detected.