The day before cooking, mix the rub ingredients (salt, pepper, garlic powder, onion powder) in a small bowl.

Liberally coat the pork shoulder with the rub, patting it in.

Wrap the pork tightly in plastic wrap and refrigerate overnight in a dish.

Prepare your grill for indirect cooking (heat on one side, meat on the other).

Cover grill grates with aluminum foil to direct smoke under the meat.

For gas grill, turn heat to high; for charcoal, prepare as usual.

Make an aluminum foil pouch for wet wood chips, poke holes in the top, and place directly on the coals or deflector plates (not on the grill grate).

Oil the grill grate, place the meat on the grill, close the lid, and wait.

Ensure grill vents are mostly closed, except for the vent on the meat side to draw smoke towards the meat.

Preheat oven to 275 degrees F (135 degrees C).

Place a cookie sheet on the bottom oven shelf and fill it with water.

When smoke stops, oil the oven rack above the cookie sheet.

Place the meat on the oven rack above the water-filled cookie sheet.

Maintain a temperature of around 275 degrees F (135 degrees C) at the meat level, whether on grill or in oven.

Avoid adding too much smoke.

For charcoal, add briquettes to maintain constant heat.

For gas, ensure sufficient gas for 12+ hours of cooking.

Make the BBQ sauce by combining cider vinegar, white vinegar, water, garlic powder, smoked paprika, chili powder (optional), red pepper flakes, and hot sauce in a jar.

Prepare slaw by mixing cabbage, mayonnaise, sugar, vinegar, celery seed, salt, and pepper.

Cook the meat at 275 degrees F (135 degrees C) until a meat thermometer inserted into the center reads 200 degrees F (93 degrees C).

This will take 8-12 hours.

Once the meat reaches 200 degrees F (93 degrees C), remove from oven, cover with foil, and let sit for 30 minutes.

Increase oven heat to 325 degrees F (163 degrees C).

Shred the meat using two forks, removing about half of the fat.

Mix the shredded meat with 2 cups of the BBQ sauce, ensuring it is juicy but not saturated.

Place the sauced meat in an oven-safe dish, cover, and bake at 325 degrees F (163 degrees C) for 30 minutes.

Serve a generous amount of pulled pork on a bun, top with slaw, and drizzle with additional BBQ sauce.