First of all, do you know how to use the
WSM? I'm asking, not judging. In order to make good Que, you have to master the equipment. Learning the temperature, guages, quantity of charcoal, cooking methods...all these takes time.
If you're a fan of Gary Wiviott, author of Low & Slow, he recommends that your first cook should be Chicken Mojo Criollo. This is using 2 whole fryers, split in half, along with a bottle of Goya's mojo criollo; olive oil; 1 lemon and salt.
This can be done within your time frame.
In my opinion, take the time to learn the machine. Heck, once you learn how to work it, jump into butts. Enjoy!!!