We used pieces of drain tile and cut them to fit just below the first set of branches which is usually 2-3 ft. The deer will still destroy a tree if they can get close to it. We've had deer stand on their hind legs and push a tree over, hold it under their body, and eat the living shit out of it. Support ropes just provided a convenient snapping point for them to break the tree right off. We feed the deer all winter so needed something to protect our orchard and hog fence has worked for 5 years now. Even with 100 deer give'er take coming to the yard every night. The deer can prune the branches that grow through or close to the fence which I don't mind at all, but they can't get at the majority of the tree. We've tried to fence off more than one tree, but the 18 ft spacing between trees allows enough area for the deer to just jump in and wreck things. It's a bit of work to ensure the trees make it to a size where the deer no longer pose a serious threat to them, but if I want fruit, I'll have to earn it I guess.