I'm with Rob. Go to both events, be positive and happy. Maybe on Monday, do the "Really Important Guest on Johnny Carson Who Always Had to Leave Early" thing.
(to your daughter): "Sorry to have to leave a little early, honey, but I've somewhere else to go. I hope you had a nice two days -- sure love you" (or whatever) -- and ((POOF!)) -- disappear, with new clothes and new cologne on.