Some neat ideas brought forward, and sounds like the chains on a rim idea would work. At this point, my contraption is on hold and I've got my posts peeled.
I'd walked by the pile with a shovel on my hand and gave one of the posts a poke and a chunk of bark came right off. Poked away at it for another few seconds and more came off easily. Went to the shop, grabbed a spare shovel handle and a chunk of scrap steel and built a spud and started peeling. I was peeling strips several inches wide by half or 3/4 of the post on one shot.
It was working well but seemed almost easier to just pull by hand. Back to the shop, 2 saw horses and a 3/4" chisel (no idea where my draw knives are) and I was back in business. With the exception of 4 that the bark was too dry, I was comfortably peeling 10 an hr. By that math, I couldn't build what I had in mind in that time.