This Penn State paper offers a good background info http://ento.psu.edu/extension/factsheets/brown-marmorated-stink-bug
There were so many of these creatures it was like a biblical plague. The vacuum cleaner method seemed to be the best approach to getting them out of the house. They are resistant to many pesticides and they do give off a mildly offensive odor when they are threatened or die. We found they liked dark folds in the curtains, crevices in upholstery, behind pictures and mirrors on the walls, and other nice dark easy to get at spaces. They come indoors in Sept -Oct looking for places to 'winter over'. For collecting them without a vacuum cleaner, a large tall glass with some soapy water is good. One of their defense mechanisms seems to be to fall so if you tap the glass on the wall underneath them they often just let go and fall into the glass. They are good swimmers but the soap kills the surface tension on the water and they will sink and drown. The best defense seems to be sealing all the cracks around the doors, windows etc.
Have fun with these creatures! It is a bit like a bad Sci-Fi movie.