We are not positive what stink bugs you are refering to. Regardless, they are probably coming inside ot overwinter or as a result of the temperature changes. It is likely that you can reduce future problems by locating the source of the insects. How to best to control them really depends on what kind they are. We have come to find out that it is of the Coleoptera Tenebrionidae family.
Tenebrionids are one of the most diverse families of beetle in california.
Most of them are quite resilient and omnivorous. Your beetle would probably prefer to be kept dry and warm, but never hot, or in direct sun. It should eat a variety of starches and veggies. Ideally i would offer it unsalted sunflower seeds, or something similar, and a few chunks of carrot, and possibley a chunk of dog food for protein if you have it. Remove items that get moldy.