>>2793265My spark arrestor is now just over two feet from the tent, so it's maybe 60-65 cm. The main issue is that I mostly camp in the American Southwest and hardwood is difficult to come by. I can take some with me to the wilds, but in a trip of any significant length I have no choice but to burn the more abundant softwood, but you are absolutely right that you should burn hardwood whenever possible.
>>2793267Sometimes it starts glowing before I adjust it down; I let it rip right after feeding so that the fire doesn't slow down. I like to take pictures of it every now and then but I never let it run that hot for longer than a minute or two.