I guess it's a matter of preference, and personally, I prefer a little more smoke than Wolgast for pork butts. However, I'm not worried about getting smoke the whole time or even into the stall. If I do, that's fine though. I'm more interested in getting smoke on at the first of the cook.
Regardless of preference though, wood species, moisture content, size of chunks, and even the size of the butts are things to consider. Not only will smaller butts take less time to smoke, but they have more surface area to smoke, so they don't need as much smoke.
I've been thinking lately that my pork butts just didn't have enough smoke flavor, and was seriously thinking about getting another stickburner. I think the thing is that if you go to bed and cook overnight, you just don't know how much smoke the butts actually got.
Well, this is what worked GREAT the other day. I smoked two big ones all day Saturday, one was 9.26lb, and the other was 9.12lb if I recall. I used four small chunks of green peach (just cut from the orchard) about 2X3" on top of the pile, and had three (or maybe four) little smaller than fist size chunks of seasoned nutwood down in the coals. Only one was hickory (dry and store-bought), but the other two or three were white oak chunks that still smelled good and weren't that old. Well, the butts were fantastic, and had a much deeper smoke flavor that was more like that off an offset. They might've been too smoky for some folks taste, but everyone 'round here seems to like some smoky pieces of bark mixed in to flavor the 'Q. I was able to monitor the smoke by cooking all day, and even though my peach chunks were small, I was able to keep up the smoke long enough by turning chunks a couple of times. You can always get a little more smoke out of them that way, and although it won't last as long, it's better smoke than what you get when you first add another chunk of wood. I will say that I don't like NEAR this much smoke for ribs, and even less on chicken.
To sum it up, trial and error, but find out what you like and don't be afraid to use enough wood. It's not like oversmoking your pork butt past your taste a little is gonna ruin it or anything. Just don't mix as much bark in if that happens. However, I don't think I've EVER "oversmoked" a pork butt on the