The romantic notion of roasting a dog over an open flame leads to that oh-so-familiar black and cold dog. Instead, build a proper cooking fire burning hardwoods like ash, birch, or beech down until you have a good bed of hot coals. Rake the glowing embers to one side, or better yet, build a keyhole fire ring that has an area to keep the fire going and a place to cook over the coals. You'll want the heat source in the medium-hot range, which you can gauge by holding your hand 4 inches over the coals. If you can keep it there for 5 seconds, you're ready to roast your wieners.