I want to fence in the back 2-3 acres on my property and half is open "potential" pasture, and the other half is a rather steep wooded hill. It has a small walking traill cut around the property. It is a bit too steep for a tractor(which I don't own) and I figured the roots would impose an endless problem with a posthole digger. Is there a correct way to nail a fence to a tree? Possibly put a 2x4 inbetween the tree and the goat wire.