"Just go, because it won’t be any easier or straight forward later, and it won’t be "that bad" during, and you won’t remember everything regardless." – Dave, father of Lucy, 26 months
As my brother puts it, take the bar you have set for yourself, dig a hole, and drop the bar in the hole. DROP IT! In other words, forget everything you hope will happen while en route and instead focus on being flexible, patient, and entertained at the surprises.
While we are busy lowering our expectations, a note about cleanliness. Pack your own wipes and sanitizer, take janitorial duties into your own hands, and always bring extra snacks, pacifiers, and chew toys since those most often fall on the ground.