Panel 1: We find ourselves watching Elly pack a suitcase as Elizabeth watches. As she does so, we see John standing in the doorway and asking her if she put in his blue shirt and his socks. Elly says that yes, she put in his socks.
Panel 2: This pleases him because the last time he went on a trip, he couldn't find his socks, belt or underpants and everything looked as if it had been slept in.
Panel 3: Liz sets up the slam at Rod's expense by asking Daddy why he didn't pack his own suitcase that time.
Panel 4: He rolls his eyes in frustration and says "I did."
Summary: While this is meant to be a sequel to that strip I mentioned about him not realizing that telling her that she does what should be his job better than he cares to doesn't mollify Elly in the least, it also reminds us that left to his own devices, John would end up living in filth and dressing like a fool.