Also:
@lifesucks
The preparation is difficult because, well for me it's going to basically take a full day of gathering materials. but the method itself, if pulled off correctly, is supposed to be very peaceful and even if there were nausea/headache it's still much better than the panic and pain induced by some other methods like pills with no benzos or hanging. I will be brutally honest here but the stories I hear about extreme vomiting and backing out of the method don't ring true to me, because I've made a failed attempt at this before and well.. I felt nothing at all. I only backed out because my location was bad and the method action wasn't fast enough.
Find a location where you're able to sleep with your coals, even lower concentrations will be lethal so long as you don't skimp massively on the charcoal quantity. If you're asleep then whether it takes 1 hour or 5 hours, you won't know either way.
Edit: from the 8chan thread "
>>39597
Some people speculate that you bypass the nausea, dizziness, and headaches that accompany CO poisoning by sitting outside and letting it build up but with a small area like vehicle, bathroom, or tent the levels will climb fast enough that it shouldn't make a difference. It will work both ways."
