Yea, I just said 75 since the two dozen isn't an exact count. It's most likely more. I've got some trees also that have gotten so big the no longer need the protection of a fence and have remove the fence from them and put it around others. I like the tire idea.
I've probably got a dozen or more old Semi tires. Three to a tree of them would probably work. Might even have as many as two dozen car tires. I'll put them to use.