(Strip Number 4475, Original Publication Date, 1 March 1985)
Panel 1: Elly succumbs to her innate sentimentalism and need to martyr herself when she tells Susan that the family that she can barely tolerate at the best of times would think she would be insane to simply take off to Winnipeg with only moments' notice.
Panel 2: Susan reminds her of the many good things she'd be turning down: a spacious hotel room all to herself with no kids around, a private, kid-free biffy, the chance to talk to new people who don't blather about whatever useless things that kids waste time worrying about, dining out without having kids trail after her, time away from kids who think that the sum total of her existence should be sitting on a stool somewhere in the off chance that she's needed and so on and so forth.
Panel 3: She then asks Elly if she really wants to turn that down.
Panel 4: Elly smiles as she admits that she'd have to be a lunatic to do so.
Summary: This, I think, is the template for the annual "Escape from the house of clingy brats who think that God made Moms so kids wouldn't have to clean things" trips that John and Elly would inflict on April in the 1990s and 2000s. The same need to hate kids animates both phenomena.