... without getting stung multiple times, that is? Can someone direct
me to a do-it-yourself FAQ in this topic? (I have a notion that this
common home-owner problem probably gets asked about and answered on a
regular basis.) Thanks.

It's not that complicated. Get a can of wasp spray (I like foaming-type,
but others don't care). Wait until dark. Go out with a flashlight and the
can. Light on! Spray with gusto! Light off! Walk (don't run, they take
running away as a sign of guilt) quietly away.

If this is not end-of-story, call a professional and gladly write the
check.