The basics of clay/fiber infill systems are not complicated. You basically coat woodchips or straw in a fine clay slip, then pour this slurry into the wall. Once it dries it provides decent insulation and some more structural integrity (which I definitely don't need). The clay regulates moisture eliminating the need for vapor barriers. From what I have read, I expect about R-2 per inch, which is not much but the thermal mass will work to my advantage. This would also be a good base for a plater finish on my walls. I already salvaged a pile of wooden lath from a renovation down the road a few weeks ago. I still need to take a good look at the weight issue if this house is going to be mobile though.
Here is a link to the Fox Maple School (where I had my first timber framing experience) article on woodchip and clay infill.