A long smoke

The other day, I was in Asda and they had decent sized bone-in pork shoulder. It was dirt cheap, so I bought two, on the principle that while I had the Traeger going, I may as well fill the shelf.
I've cooked pulled pork before, but always against time constraint, so invariably I've smoked for about 10 hours, then whacked the heat up to finish, before resting and pulling. The pork I have ended up with has been nice and tasty, but I know I could do better. This time I am cooking for the fridge (or freezer), so it doesn't matter how long it takes.
So having had it sit with a rub for 8 hours, I started these off yesterday, at about 8pm. I checked them this morning, and the grill was still going - the grill temp was at 180 F, and the meat was at 140 F. I've left the Traeger on the smoke setting, and the grill temp has crept up to 220 F (I expect that to fall a bit, as it has started to rain), and the meat is currently at 158 F. It has now been cooking for 17 hours, and still seems to have a long way to go, however, the temperature *is* steadily climbing.
So do I just leave it at smoke temp (200-220) until it reaches 195? Or do I need to whack the temp up to medium (approx 325) to get it to the final temp?
I've cooked pulled pork before, but always against time constraint, so invariably I've smoked for about 10 hours, then whacked the heat up to finish, before resting and pulling. The pork I have ended up with has been nice and tasty, but I know I could do better. This time I am cooking for the fridge (or freezer), so it doesn't matter how long it takes.
So having had it sit with a rub for 8 hours, I started these off yesterday, at about 8pm. I checked them this morning, and the grill was still going - the grill temp was at 180 F, and the meat was at 140 F. I've left the Traeger on the smoke setting, and the grill temp has crept up to 220 F (I expect that to fall a bit, as it has started to rain), and the meat is currently at 158 F. It has now been cooking for 17 hours, and still seems to have a long way to go, however, the temperature *is* steadily climbing.
So do I just leave it at smoke temp (200-220) until it reaches 195? Or do I need to whack the temp up to medium (approx 325) to get it to the final temp?