Prepare a grill fire to about 350° using hickory or oak for smoke flavor,.
Remove stem ends from jalapeños along with seeds and membranes.
In a bowl, combine cream cheese, cheddar cheese, garlic, salt and pepper until smooth.
Fill jalapeños with cream cheese mixture.
Combine sausage and beef in a bowl and divide into 8 pieces.
Wrap the meat mixture around the jalapeños, covering both ends.
Wrap with bacon, about 1 1/2 slices for each roll.
Place over indirect fire on the grill and cook with the grill closed.
Cook for about 30 minutes. Check with a digital thermometer, testing the sausage, not the center of the jalapeño, cooking until internal temperature reaches about 160°.
Brush with bbq sauce and continue to cook until sausage reaches 165°.
Remove from grill to a serving platter and rest about 10 minutes before serving.