Welcome Jeff. You've already gotten some great info.
Injecting is definitely a preference thing. For us, we always inject.....always.
Our injection is a mix of peach juice, Frank's Red Hot, salt, sugar, Worcestershire, AC vinegar, a bit of rub and a few other things.
We don't temp before foiling any longer, we just kind of know when the bark has the right color. We then DOUBLE wrap in HD foil, adding some liquid (peach juice and BBQ sauce). Personally, if you're a wrapper, I believe it is very important to double wrap in HD foil. If that foil breaks, all of your moisture is leaking right out...and if the foil is going to break, it will ALWAYS break on the bottom.
Best of luck. Keep us posted on your results please.