we hunted hogs with knives and pit bulls in south georgia for years, I took a cold steel "boar spear" with me once and I found it tough to carry through the woods and swamps due to thier length. Didn't get anything with it. After that my buddy at work bought the spear off of me.

I imagin that hunting over bait from a treestand would be the most effective way to hunt with one.

Or just learn to use an atlatl.

If you go to accuratereloading.com they have a spear hunting forum.