Permanent Aerial Silks Rigging for Backyard Trees

Hi everyone!

I am looking to rig a dynamic line for my gf to practice aerial silks. We're planning on doing it between two giant trees in her back yard - each of which are easily 4 feet in diameter if not 7. I'm reasonably well versed in rigging (ive rigged slack lines, hammocks, and rope swings), and have a pretty good idea of what it would take gear wise to make this happen. Looking for advice from anyone who has actually done this before?

Whats your experience with it?

Aside from aerial gear, what gear did you successfully use?