Progress marches on with the patio work. We've gotten all the way across (to the south) from the house on the lowest level, and put in two steps.
We needed to put in something on the lowest level so we'd have a constant point to measure the other things, and then we just kept going south so we could start experimenting with what to put in the cracks.
We're thinking we'll get stuff to grow in those cracks... moss? grass? not sure what will be best yet.