Smoking meatloaf outside of the traditional pan (only on parchment paper) does a great job of adding smoke to the meat...
and i can see this working well smoking meat for chili....
Dave, i would try just placing the ground beef and ground pork in a pile on parchment on your smoker (or grill)
over low heat (maybe 225 to 275ºF) for a short period of time... an hour? two...?
dunno man... but heck yeah, i'll try it.