Yes, freezing in zip-lock freezer bags works great and thawing in water. But do you need to freeze or just refrigerate the butts?
Here is a blog post I wrote a while back on cooking pulled pork in advance:
http://www.smokymtbarbecue.com/2011/...rk-in-advance/
It has worked well for us.
And yes, we do have experience in cooking Boston butts:
http://www.smokymtbarbecue.com/2011/...2-pig-roaster/
Have fun!
