from Buffalo

Spread aluminum foil on the ground.

Using a vertical turkey roaster, place 12-14 lb. turkey on foil.

Inject the turkey with your favorite liquid marinade OR season turkey with an all-purpose spice OR not...

Cover turkey with suitable pot.

Using 10lbs. charcoal build a mound of brickets around the pot.

Light the brickets.  (I prefer to use a butane torch.)

Once the coals turn white, cooking time is 7 minutes per pound.