Thanks all for the replies. I seem to be able to find about 6lb pork butts, do you see bigger ones usually? I'm wondering if I should go talk to a local butcher, instead of grocery stores, etc. See if I can't get a bigger cut around 8 - 10lbs.
I will be doing a 2nd burn in on my smoker this week, and maybe just smoke some brats for kicks while i'm doing it. My first true test-run will be for a family reunion at the end of this month, I will use my new smoker and do about 35lbs of Pork butts, I need to feed about 75 people.
Then my huge first time test will be for about 350 people, so I will do about 175lbs of Pork butts.
I will be using my Big Daddy Triple Barrel smoker I just made, at least that's my name, based on a different version of Big Baby Double Barrel
I will be posting some new pictures of it, now that I have added smoke stacks, fire box door, and a 2nd temp guage.