In a small bowl, mix together brown sugar and cayenne pepper.
Lay bacon strips on a wire rack set inside a foil-lined baking sheet. Sprinkle 2/3 of the brown sugar mixture on top of the bacon strips.
Light one chimney full of charcoal. When all the charcoal is lit and covered with gray ash, pour out and arrange the coals on one side of the charcoal grate. Set cooking grate in place, cover gill and allow to preheat for 5 minutes. Place entire baking sheet with bacon on grill rack, cover, and cook until sugar starts to caramelize and bacon begins to crisp around the edges, about 15 minutes.
Brush bacon slices with maple syrup, flip, and brush second side with syrup. Sprinkle on remaining brown sugar mixture, cover, and continue to cook until bacon fully crisps, about 10 to 15 minutes more. Remove from grill, let cool, then serve.