Also,helps keep from taking on continued smoke in those stickburner pits.Seems like butcher paper "wicks" oil away by contact,while still allows air to pass thru,while blocking some smoke particles?They say it doesn't eat holes thru it like foil does and easier to handle without gloves.
You need the old slo/lo temps rather than Myron's hot cooking ,or you wind up wih candles.
Doesn't steam/parboil the interior meat and mush the bark like plastic ,or heavy foil.
We see heavy paper grocery sacks around the South, to hold whole shoulders/butts the same way.Cooks say butcher paper doesn't let the meat fall thru like brown paper bags.
Have talked to some teams that do it in the South, with mixed results.Seems they need about triple thickness of butcher paper.Some paper has a coated side and not sure how you faced the meat.
We were cooking the state championship in Charleston,SC at a big plantation there and state cooks used cotton pillow cases and one team by us used bed sheets to get the correct thickness.They used to use clean unused feed sacks in the old days,but now they have some kind of coating on them.
Too many things to think about for ol' country cooks like us.