Tyler Ludens wrote:You might be able to fasten boards to the trees with screws or nails and then staple the wire to the boards.
Here is a good article describing how to properly use trees as fencepost to fence woods. It involves Tyler's suggestion plus pollarding the living posts . Seems to me the most cost effective option if you have a lot of land to cover.
https://northernwoodlands.org/articles/article/living-fenceposts