I did see her! And at packet pickup, I overheard a mom asking how she could time things so that she could do Girly Girl and then come back and do the 10 miler with her daughter. And I saw plenty of tandems. At least one of those tandems had a blind stoker whom I've seen at triathlons. It's just a delight, this ride.
"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks