I tried smoking a pork shoulder on my gas BBQ last summer. It has double gas burners with lava rock over them and two grills inside (one directly over the coals, one elevated).
I made a rudimentary smoking box from a foil tray filled with Weber wood chips, then wrapped in foil with a few holes poked in the top. I placed this on the grill over the right hand burner, and a water pan over the left hand one. The pork shoulder went on the upper rack on the left hand side. I cooked with only the right hand burner going (under the wood chips) for 2-3 hours.
It came out OK. The missus and the kids liked it, but it wasn't the pork experience I was looking for (it didn't pull very well).
However, at the time I was flying completely blind and had done little research into slow & low. Pretty much the sum total of my knowledge was that I needed some wood to make the smoke and I should have the meat offset from the heat. I used a boneless pork shoulder from Tesco and I didn't do any form of temperature monitoring, nor did I know at what internal temp the pork would be ready for pulling. All the basic stuff that I've learned from here really.
I'd agree with the "too well ventilated" sentiment above. When I see the lengths people her go to with controlling the airflow through their smokers, I can't see that the draughty lid on my BBQ does much to keep the temp stable. Still, if we never have a go we never learn, so I reckon if I tried it again I could definitely improve. Hopefully my planned UDS build will make my pork dream a reality.
