My Grandmother was sitting on ready. She loved to travel, it didn't matter if it was by car, train or plane. But if she ever went somewhere by plane she wanted the plane to have four engines, and years later it was only by jet.
Her suitcase was always sitting in her closet waiting and ready should someone invite her to go somewhere with them.
She would just throw in a few of her clothes and put her belt around her suitcase and out the door she would go.