If you can, why don't you dig about a 4 foot post hole, cement in a PVC pipe in the ground, use a 3 inch if you are planning a 2 inch pole. Then all you have to do is pull it out when you are done. Cement a collar with thread at the top and screw in a plug. I have had that for 3 years and it works great. You want to have it deep enough to steady your pole, but still use guide lines. For my ring I use guide lines, 4 of them, from the top of the pole, attached to the lifting head. They are then attached to the ring and you can adjust it to make it even.