Looks like I go the other way. I always inject. I start with the basic Chris Lilly injection and add apple juice instead of water. I used to have some sour cherry syrup and would add a touch of that -- not much. I buy my butts in vacpacs and inject right through the plastic. Just inject from one side and don't poke through the other side. If I am injecting the day before I'll leave them in a cooler with ice. If I am smoking them the same day I try to give them at least an hour before I rub them down.
WSM x 2, Weber 18.5", Weber 22" x 2, Performer, Genesis Gasser