Next I start the block in, very broadly, laying in the darkest patterns first, followed by the lights. Aside from the usual burnt sienna I use for the tonal sketch, I have limited my palette to three primaries plus white (cadmium yellow light, alizarin permanent, and ultramarine blue).
The sky will be my lightest light, but I've put off laying that in until I have something of the mountain laid down.
Here's where I am after a few hours' work:
Next I will start laying in the sky and blocking in the haybales before going back in to refine overall. I think I've gotten some good information down so far. Now I just need to keep building on it and solidify my plan. More to come soon!