Alas, there's no way to get any heavy equipment in the back yard, because my house is built on a steep slope. The back yard is entirely fenced in, and both side yards are landscaped with big flagstone steps, so there's no way to get equipment down there even if I removed a portion of the fence. And even if my deranged neighbor wasn't so deranged, it wouldn't do any good to ask if I could bring in heavy equipment through his yard, because my trees were planted at the very end of my yard, which is terraced in by a five-foot high retaining wall made of landscape timbers, and there's a 90 degree perpendicular drop-off between my yard and my neighbor's.
I wonder where I can get some of those M-80s...