I season my pork butt 24 to 48 hours before smoking. I have used Grillmates Applewood Rub, Famous Dave's Rib Rub, Tone's Sweet and Spicy, Grillmates Brown Sugar Bourbon seasoning. Last one I did I used a combination of apple wood and hickory wood. I smoked it for 6 hours on 230 degrees then wrapped it with tin foil and put it in the oven for 4 hour at 300 degrees. If you are pulling it apart, I think you cannot over cook it as long as you keep the moisture in the meat.................. Sunday I BBQed bone in pork ribs, when I seasoned them Saturday, my wife thought I was nuts with the amount of seasoning I put on them, but come Sunday, after I had BBQed them she thought they were great.