Baymule
Herd Master
That looks pretty tall. That would be a LOT of concrete bags. I've seen it done, that's where I got the idea from, but that would take a lot. I like the rip rap held in place by wire, maybe cow panels if the chunks are big enough that they wouldn't fall through. Sheep and goat panels have 4" holes, horse panels have 2"x4" holes, or buy a 100' roll of wire with the size holes that suit your purpose.