Most of the work was overcoming another great idea by previous owner. Instead of running the circuit from the house to the door opener motor to a switch and then to plugs, he ran the circuit to the switch, THEN to the switch-operated plugs, THEN to the always-on garage door opener. It made things more complicated than they needed to be. But at 9 PM I had the door running, the lights working, and all ten fingers intact. A real electrician could have done the whole job in about an hour, but a real electrician doesn't live here, so frell that.
It works, it's ready for Monday, I'm satisfied.
Interlude: we were going to meet TJ and his buddies and take them for dinner. We were ready to leave, and called for Bogar the beagle. No answer. We found him in a planter box, literally pooped out, unable to move, ants crawling over him. OFF TO THE E-VET! Turns out he was in anaphylactic shock from bee sting or something. So he has spent the night at the E-vet, getting fluids and being watched for signs of internal disorder. I thought we were done with this gig when Comet died. well, he's alive, Kate's muchly relieved. Would have liked to have met TJ's friends, though.