Here is a pic of a setup that I made.
The key to the setup for me was the paracord that runs from the pole to the tree. This helped to keep a constant force on the pole, so that when when I would get in and out of the hammock the pole woud not move. I also created a little base at the bottom of the pole, with 2 stakes going threw it, to hold the bottom of the pole in place. This was done by just routing out the area for the pole and then drilling two stake holes.