I have had good luck freezing pulled pork as well. Whenever I make pulled pork, I always make a point to save the drippings that accumulate in the foil pan when I wrap the brisket while cooking. I separate the oil out of the drippings and discard the oil. I pour the remaining liquid through a sieve, put it in a ziplock bag and freeze this.
Whenever I go to reheat frozen pulled pork, a I break off a piece of the frozen drippings and melt it into the reheating pulled pork. I think this gives much better results that just reheating dry pulled pork.
Another thing I do with frozen pulled pork is reheat it with red or green enchilada sauce and it makes an excellent burrito filling.