I guess I'll swim against the current here. I foil my butts. I inject my butt with a mixture of apple juice, vinegar, salt, and sugar and let it rest for a couple of hours for the fluids to stabilize. I pat it dry, then rub it with olive oil or mustard as a binder, then give it a generous coat of rub. I cook at 275* for three hours, then remove from the smoker. I place it in an aluminum pan and give it a light shake of rub again. I put some apple juice in the pan, cover with foil, and cook to a temp of 200*. The pan is removed and drained, then the butt gets a coat of pork glaze, a light coat of rub, then back on the fire uncovered for 30 minutes or so. Don't have any complaints.