As an alaskan that has lived in the "bush" and camped for months at a time in addition to bike touring where I camped, using both gas and camp fire, I've used just about every type of fire. A very small fire for cooking over a small pot is one excellent suggestion but I would add that you want a small diameter fire, but to get a nice bed of coals you need to use more wood than most folks might imagine. If room and safety allows you can built a good size fire and scoop coals into a small pile but the idea of starting one good fire and getting coals, then beginning a second fire to take over the duty is one i've often used. Baked potatos are an excellent camp food but they do require a good sized fire that allows you to basically bury the potato in coals. Crumple up tin foil and wrap the potato loosely in the tin foil. With it crumpled up the potato doesn't directly touch the fire. Then wrap that with another layer and put the potato on hot coals. It will still take about an hour to cook but what a treat! It's not a great bike touring food but for outdoor camping where wood is no problem it's great.