Next you should dig
a hole in your fire pit, deep enough to totally bury the
entire pot. Our fire pit at home sits on solid clay, so
we came out to the lake where the pit on the beach sits
on gravel.
Digging a deep pit was easy and the tiny stones
were useful for holding the heat overnight. If you're
working with soil you can line the pit with stones. Build
your
fire on top of the pit to start making coals, or start
the fire and dig the hole later.
It will take 4-5 hours
of stoking. We chose to light the bonfire at 4 PM
and then kept it going until the party wound down at 11
(it
was
a weeknight). By then there were enough coals to
put the beans in to cook overnight.