Having read here that good browning depends on humidity, and living in a low humidity area (most of Washington is, or verges on desert) I had a thought.
Years ago when we heated with wood, my wife had issues with the lack of humidity in the house.
I found a thing that diverted the dryer vent into the house, added humidity and some heat.
Could the same idea be used to divert the dryer heat and humidity through a box holding the barrel,
or anything else that one is browning?
I do remember that we had to have a filter of some sort as it does still have lint, so a nylon or something would need to be attached to the in line.
Just a thought.