I have to admit I foil both my ribs and my brisket, but never a PB.
I have tried it all with PB, injected, marinaded, rubbed etc, and I found I like to rub it, wrap it in saran and then foil, let it sit in the fridge for half a day overnight, and then smoke it till its done.
I do let it rest in foil for a while so it can cool down so I can shred it.
Brisket I do foil abou 160, I just cant seem to get it right any other way.
Ribs I am still doing the 3 2 1 method, but I dont really do a lot of ribs, none of us like them too much, and I just cook for my family and friends.