Yep, sounds like a plan.
Another way is to attach the end of a steel EHS guy cable to a pulley. The steel cable goes thru the tree limb. The pulley gets pulled up and hangs out a few feet from the tree limb top and gets a rope thru it which supports the dipole.
This is how I do my trees now. We lose a few feet of height, but the pulley always works smoothly to drop the dipole. The pulley can be pulled down for servicing if needed. A weight can also be attached to the end of the rope to let the dipole move in the wind.
T
I like that idea of using a steel guy cable and a pulley. I think I am going to do that when I put up the new antenna. It will make life a lot easier for me when it comes to raising and lowering the antenna for maintenance. And I won't have to worry about the issues with the trees growing around ropes. Not to mention less chance of breakage due to wind. Sounds like a good way to go.