Pretty good score today. A factory near me put out a bunch wood scraps. Most are one by two or so, 8 feet long. I took a picture when i loaded half, but my phone went dead after. I got almost twice this much. Mostly pine, but all good for charcoal.
One of the most difficult types of wood to deal with, are tree stumps. They kill chainsaws because of mud and hidden rocks. But they could easily be broken down if first turned into charcoal and then struck with a hammer. Probably the easiest type of wood to obtain around the neighbourhood because anyone who has one is likely to want it gone.