1. Start by combining the bourbon, brown sugar, and barbecue sauce in a bowl. Add the pork tenderloins and ensure they are fully submerged in the marinade. Cover the bowl and refrigerate for at least 2 hours, or preferably overnight, to allow the flavors to infuse the meat thoroughly.

2. Preheat your oven to 375°F (190°C) in preparation for baking the Bourbon BBQ Bacon Wrapped Pork Tenderloin.

3. Remove the pork tenderloins from the marinade and pat them dry with paper towels. Season the pork all over with garlic powder, onion powder, smoked paprika, salt, and black pepper. Carefully wrap each tenderloin with the bacon slices, securing them with toothpicks if necessary.

4. In a large oven-safe skillet or cast-iron pan, sear the bacon-wrapped pork tenderloins over medium-high heat, turning occasionally, until the bacon starts to crisp up. This step helps to lock in the flavors and create a delicious caramelized crust.

5. After searing the pork, transfer the skillet or pan to the preheated oven and bake for 25-30 minutes, or until the internal temperature reaches 145°F (63°C). Basting the pork with the remaining barbecue sauce during the last few minutes of cooking will give it a delightful glaze.

6. Once the Bourbon BBQ Bacon Wrapped Pork Tenderloin is cooked, let it rest for 5-10 minutes before slicing.