Thanks for the help, everyone. We haven't seen anything in particular in the house that looks like a carpet beetle, but we haven't looked too hard - what with the swamp and all, we've got hot and cold running bugs and we usually don't notice unless there are a million of them (the super-small aphid thingies from the last post - I'm guessing they're not involved, just annoying), or big enough to ride (cockroaches and banana spiders).
I'll be moving all the suspicious wools out to the garage for a couple weeks. With Thanksgiving coming up, there's no room in the freezer, but it's pretty cold out there. Most likely they've stayed out of the yarn closet because of the lavender and everything on the floor - or near the floor - is sealed up in plastic. The idea was to keep out general creepy-crawlies, but maybe by dumb luck, it worked. I'll check it out today.
I do know that when we clean the carpet, the waste water has bug guts in it. I doubt that's a good sign.
This place is a rental, so as long as I can save the wool (SAVE THE WOOL! we need to make posters), I'll let the house rot into the ground. Not my job to save it. Well, I'll mention it to the landlord. But I won't let him spray while we live here (my asthma, and I don't want the Goob exposed), but maybe as we move out, I'll say 'oh, by the way...'