I am smoking pork shoulders for a crowd of 90! Lord Help Me Jesus! I have to buy and start next week because I don't have a big smoker. One site suggested I would get 20 servings out of a 5 lb. shoulder. That sounds sort of skimpy to me. It also means if I buy 8 lb shoulders, I would need 19 for 90. I need input on this. I don't want to run out. That would be disastrous!