I've got a cousin who competes professionally and he's up there on the KC rankings. Nothing comes off the smoker without spending some time wrapping it. A lot of the guys who are out there on a regular basis all wrap their meat. (I'm done trying to not make this sound dirty ) Its not a myth that it traps the steam in the foil and helps keep the meat moist. Backyard smoking probably doesn't matter too much but I personally think its the key to good BBQ. I always wrap my ribs, cover them in brown sugar, honey, and a few other things I've picked up. After two hours or so, unwrap them for another 30 minutes with heavy smoke. Give it a try this weekend!