If it's at all possible, get yourself some chickens (banties are miniatures that are a good choice for suburban homes) and let them free range as much as possible (or keep them in a movable pen). I used to have a terrible problem with Japanese beetles until we got hens....now the beetles are a rare sight. The same seems to apply to stink bugs. A few years ago, they were terrible until the hens got a taste for them. Now, only a few.
The chickens don't actually dig up the grubs (they're usually too deeply buried), but they seem to have an uncanny knack for knowing exactly when the grubs emerge as adults.
