Sure enjoying the story and those great photos.
Modest recommendation: on tiedown knots, ditch those knots that you're using, they won't hold up to a real blow. They'll slide up the rope and things will get sloppy and loose and the plane will start rocking and eventually something will break. Instead, use three half-hitches after pulling the ropes just as tight as you can get them -- don't use chocks while doing this. I tie one main, then the other one, cranking down on it, and then the tail, pulling the plane back as I do for more tightness.
When the length of the ropes permit, I double-up the rope. The idea is to gain more stiffness. Anything to keep the plane from moving around.
I learned this after some 100+ mph winds at the Boulder Airport in 1981 or 1982. We lost about a dozen airplanes. I walked among the wreckage examining what failed, and among the survivors, examining what worked.
Dave