It is not an immediate solution, but in the long run what organic gardeners need is lots of beneficial insects and insect predators. Stinkbugs and their like actually have many natural enemies including ladybugs, lacewings, praying mantis, parasitic flies, spiders, toads, birds. So you want to make your garden friendly to all these kinds of creatures. Plants that attract these insects include yarrow, all the carrot family stuff (including dill, fennel, coriander, etc), sunflowers, tansy, dandelions, and others.
Amaranth, okra, millet, buckwheat, marigold, and mustard are trap crops for them. Planted just outside your garden, they will attract the stinkbugs to them, getting them to leave your crop plants alone. Then you can just bag the trap crop plants and dispose.
If you have a bunch of them, you can try vacuuming them up with a hand held vacuum.