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My latest Smoked Pork Loin. Did a Extra Virgin Olive Oil coating with a Rub called Secret Weapon. Slow Smoked at 225 degrees for 4 hours 1 hour at 350 degrees to internal temp. of 160 degrees had around 1/4 inch smoke ring. This was amazing with juices throughout and so tender you could cut it with a fork. Done on a GMG Daniel Boone using Hickory pellets.
You are going to get all kinds of ways and suggestions on how to do it such as wrap and don't wrap. Most of this all comes down to personal preference.
I have been reading up on Brisket and yes some say wrap and others say don't. Not sure what the benefit of wrapping brisket is, as some of the cooking ideas I have read said to wrap my bottom round roast. I opted to just go straight to grill and it turned out juicy and tender.