I have several trees that need to be "elevated" - - that is the term used around here. It means the trees have lower branches that need to be cleared out. The tree crews around here all want to use spikes, though I've read that is not recommended. Most of the trees that need work are Beeches too, which has "skinny" bark and I would not want to use spikes on those. So, how is it done, if not with spikes? How does the guy get up the tree without them, without damaging the bark / tree?