This is a thread concerning the creation of an invincible garden. Rule #1 Nature is commander-in-chief. I just help out and make suggestions (aside from the two hugels). The boss already has cover crops going.
We are surrounded by nearly insurmountable opportunity -- Bill Mollison
I've taken a similar position with my garden Huxley.
One of the biggest things I do now in my garden is to observe. It's also my favorite thing to do.
If I can find out which plants do better in different locations, sunlight, and moisture, it makes growing them a lot easier and a lot less work.
Most of my gardening now is doing some initial small earthworks by hand to create diverse growing areas, and then mostly plant, observe, and harvest. Like you mentioned I do some tweaking and changing every once in a while, but after it gets established, it does most of the work!