Sounds great. For pulled pork, instead of shoulders, you should pick up some Boston Butts. On a slow smoker, start at 5PM, take em off at 5PM the next day. Some of the best chopped/pulled pork I have ever eaten.
http://www.grillsdirect.com/barbecue...kersmoker1.cfm
This is the smoker I use, and can cook 6 Butts. Hope it will turn out great for you.