I haven't done much hog hunting but am gearing up for it now as our West Oz cropping season gets closer. Am nearly finished building a trap with swing-down gate using mainly old steel-angle bed frames and mesh as hogdogs suggested. I don't plan on using dogs but but it's big here in Australia.
In southern West Australia hogs are an ever growing problem, as they are all over the country. Queensland is rife with them. As long as the shooter has permission to shoot on property there are absolutely no restrictions on taking hogs anywhere in Oz. Australia is something of a pighunters' paradise.
As usual you guys give good advice here. Gentlemen, as a hog-hunting tyro I thank you for it. And that 'noble' site is top stuff.