My most portable set-up, summer 2005.
Here you can see a small bellows attached to the forge; a wooden box holding firebrick that contains the fire. Underneith the bellows is a basket holding extra charcoal for the forge. A bucket of water for quenching and maintaining the fire sits ready next to the anvil.
This is the smaller of my two bellows. The larger one is lever operated and delivers quite a blast.