wood for charcoal

For making BP, I have been using airfloat charcoal from skylighter,
but after reading a number of articles on making charcoal, I have
decided that I would like to make my own.  However, when searching for
sources of timber, I never run accross willow. Most people consider
the stuff worthless (most people don't make BP).

Hardwoods are available from firewood suppliers - not good wood for BP
charcoal. I am sure I can find pine. Pinion pine is available
everywhere for outdoor chiminea. Is this a good wood? Also, has anyone
used bamboo? or straw? Pinecones? Etc.