Having talked to people since Potlatch, now that it's not all quite so chaotic, I found out she'd basically spoken to folks Friday morning about that she'd probably come and meet people for lunch on Sunday at the end of Potlatch. (She had been making a little bit of effort to get out and socialize more.) Friday evening she was found outside her home, taken to the hospital, and I gather she passed away early Saturday morning.
Since everyone else was at Potlatch, word didn't reach until Sunday morning.
Meanwhile, vicodin is slowly wearing off again. I'm really not enjoying this.