For the most part, stink bugs are immune to anything less than VX or Sarin nerve agents, and I'm not sure they'd succumb to those. A little dawn or other soap in a bucket of water will kill them, because they drown.
We've had them here in Virginia now for several years, and the best way to deal with them is a vacuum cleaner. Just suck them up as you find them, they'll die in the bag after a while.
Friend of mine has an orchard and he says he's applied the strongest insecticides the EPA will allow. He sprays in the morning, the ground is covered with stink bugs by noon, and by sunset, every last one of them is back up in the trees munching away. So if you want to bomb/fog/spray and be done with it, they will laugh at you.