Ephraim, Tall raised beds, up at least thigh to hip high, and no more than 3 feet wide, or even less so you can reach the middle without pain.
There's also a type of
raised bed called a keyhole bed, a big, tall circle or square with one path in, and the center has a
chicken wire circle for kitchen scraps and composting, so you won't have to turn it. The size is determined by how far you can lean.
Wood walls are much easier than rock walls, obviously, for your situation.
And plenty of places to sit down nearby.
An important distinction: Permaculture is not the same kind of gardening as organic gardening.
Mediterranean climate hugel trenches, fabuluous clay soil high in nutrients, self-watering containers with hugel layers, keyhole composting with low hugel raised beds, thick Back to Eden Wood chips mulch (distinguished from Bark chips), using as many native plants as possible....all drought tolerant.