I usually work with boneless shoulders that run about 6 to 7 each and I usually cut even those into 2 or sometimes even 3 pieces to shorten cooking time.
I buy whole shoulders most often because of price, but WOW!!! THAT is a excellent price!
You have many options:
1) Like Tatonka said, You can cook them whole for pulled pork (or have them cut into sections). Whole shoulders is what I use most often when I'm doing pulled pork for large crowds (trust me nobody can tell a difference between the butt or picnic after it's pulled).
If you keep them whole they will take a bit longer to cook, but man do they have a lot of "Wow" factor when you open your pit to reveal that huge hunk of smoky goodness!
2) Ask the butcher to cut them in half into the Butt & Picnic shoulder sections. My butcher does this at no charge. Then you have two roasts to do with as you please. Use one or both for pulled pork.
3) If you cut them in half The picnic shoulder also makes an excellent roast for slicing or can be cured into a ham. Most of the hams I make are picnics because of price and availability.
The butt can also be cut into pork steaks or country style ribs.
4) Grind all or some of it up for sausage.
Keep it whole, cut it in half, cook part of it, freeze the rest... All I know is at that price I'd stock up!