This won't be a popular answer but you can do some pretty decent BBQ (mostly) indoors. You'll have to tool up a bit to do it but it works.
Run the butt up to 140°F IT in one of these ...
Amazon.com: Oster CKSTROSMK18 Smoker Roaster Oven, 16-Quart: Electric Roasters: Kitchen & Dining
Vacuum seal and sous vide at 165° for 8-10 hours, depending on the size of your butt. Smallish (5lb) butts work extremely well with this method.
I have several cookers, I just don't always feel like messing with them during the cold months. I lived in Hawaii for 24 years and it ruined me with cold weather forever.