Apart from getting a few good logs going before bed, I have used a bit of a cheat when taking the scouts camping. I cover the embers (a good bed) with foil. If in abundance you could try using green leaves to act as a reflector though I never tried this. Like @whatsisname@whatsisname said earlier tv cheat having the fire with flame in the morning. I've only ever had embers, but you can get a fire going very quickly with embers..Bear Grylls task I ask ya
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