PG77, please believe the pork butt/shoulder is the most forgiving hunk of meat on the planet. It doesn't care about steady temps, type of smoker, woods used, rubs applied, brine or not brined, injected, etc. No matter what you do to it, as long as you keep it safe (smoking between 225F and 350F) and take it to 200-205F internal temp, it will come out juicy and tender. Flavor and texture is the issue with rubs, brining, woods, and finishing sauces. The fun is discovering what YOU and your pork consumers love to eat.
Brining and injecting is great, but best used once you have a little experience under your belt.
Don't be stingy with your rub. The butt can handle it.
Fruit woods are best for a first timer, but the butt can handle even the strongest flavor woods, depending on your taste.
Don't be afraid to adjust the flavor at the end of the smoke. Some butts come out kind of bland tasting, even if brined and injected. If that's the case, one you pull it, slap it with more rub.
A finishing sauce is mandatory whenever I serve pulled pork. It makes the meat flavor just "POP!" There are several recipes in the search file if you are not a spicy heat fan.
Above all, don't sweat it! The butt will take care of you.