I put in some galvanized poles in the ground and used some brackets to mount the 2x4's to for the fencing horizontal runners. I used an auger to make the holes, dropped the poles in, beat the snot out of rocks and gravel around them, and covered the top with compacted dirt. Hasn't budged yet. Posts were 10' tall and they are about 4' in the ground. Fence is the typical 6" dog ear planks.