I'm getting ready to mount a dipole between two trees in my backyard.
Both are large sycamores and I plan to have the dipole about 60 feet up
(max).

In an ARRL publication, there is a description of using a bow and arrow
to get over the branch desired.

This is the method I guess I'll try (can't climb these trees).
Once I have the nylon fishing line over, I'll need to hoist up a nylon
rope attached to a pulley attached to the antenna itself (I mean, of
course, the support line attached to insulator).

I can't figure a way to hoist all this up without, say, 120 feet of
nylon rope in an inverted U plus the weighted support line attached to
the antenna. Yes, I can use a slip knot but I still end up having 60
feet of rope draped from the tree. Should I find a way to cut the nylon
rope near the branch? Just tie up the hanging rope?

It seems necessary to "waste" as much as 60 feet of rope in either side.
If I support the center insulator, then double that.

Is there a better way?

John

PS, Sorry, I couldn't find a way to insert something with imaginary
numbers (hi)