Heat a camping stove or grill to high (about 400° to 450°F).
Place the bourbon in a saucepan on the camping stove or grilling grate. Bring to a boil, and cook, stirring occasionally, until reduced to about ½ cup, 6 to 8 minutes. Stir in the honey, vinegar, pepper, and onion powder, and cook, stirring occasionally until slightly syrupy, about 5 minutes. Remove the pan from the heat.
Reduce the heat to medium-low (about 300° to 325°F). rub the ribs with the salt and ¼ cup of the oil. Wrap each slab separately in heavy-duty aluminum foil, wrapping tightly to form a packet. Place on grilling grate, and cook until the ribs are tender and done, about 1 ½ hours, turning the packets occasionally. Carefully remove from the grilling grate. Brush the grilling grate with the remaining 1 tablespoon oil, and increase the heat to medium-high (about 375° to 400°F). Remove the ribs from the foil, and arrange on the grilling grate. Cook, basting often with the bourbon sauce, until a crust forms on the outside of the ribs, about 2 minutes. Remove the ribs, and brush with the bourbon sauce. Cut the ribs between the bones, and serve with the remaining bourbon sauce.