I like the shop vac too. Have done it for years at our house. Non toxic. Kind of fun sucking them up and doesn't take that long, just a little patience.
so, you just lay the hose next to the nest opening and turn the shop-vac on? how long do you need to let it run? as for killing the little buggers afterwards (I'd think they would chew out of the paper bag liner if you didn't)...maybe saturate a balled up paper towel with wasp spray and vacuum that, too?
I've got a nest just uphill from my shallow well, so want to avoid toxins.
Thanks!