Windturbines - Masking some trees

Hello!
I have this video captured by a drone flying over a forest. Now I want to integrate some CG wind turbines. Tracking and all that is done. The issue I’m having is how to properly mask out the trees, that obviously should be in front of the base of the wind turbines. Any ideas?

Thanks in advance!

Note. I have been trying some simple masking, it looks ok but not any much more. I’ve been thinking of blending in some images if separate trees in front of the wind turbines. Maybe painting by hand?