I know that I'm coming in WAY late on this, but I was killin' time on a rig last year looking up the ins and outs of hog hunting, and apparently it's a great idea to get a rail road tie or a telephone pole and cut it into about a 10' section and chain it to a tree....they love rubbing on it to get the creosote off of it and onto them.
hmmm........creosote smoked pork. Sounds tasty