The easy answer is "yes" and I'm sure you will get a number of suggestions to freeze bbq for later. What I normally do is to use my Foodsaver to bag and seal the leftovers. I typically do this for brisket and pulled pork. I've also put bbq sauce in a bag and frozen it for later use. When it is time to get it out of the freezer for eating, I take it out a day before and let it thaw in the fridge. I then put the bag in a pan of hot water at about 180 degrees or so and let the meat slowly warm up. I personally think the meat sometimes is better the second time around, particularly the pulled pork.
I think the act of vacuum sealing intensifies the flavors.
+1 again. And welcome to the board, BleacherBum. You'll find lots of help around here. And if you don't have a FoodSaver, you can get even get away with Ziplocs.
Smoke it, pull it, bag it, freeze it... thaw it, warm it. Good to go.
"... mmmmmmm 'bacon'."
CG Outlaw w/SFB
Old classic Weber Kettle