Possible Clues:

• Tip dray over during journey in which one returns in the light?
• Excursion ending at nightfall
• Ninny clips a yacht's sides in excursion
• It doesn't involve an overnight
• Excursion I'd arranged with party
• An excursion that provides pay dirt, perhaps
• Doris needs advice about right outing
• Unusual tray covered with party food gets short outing
• Family outing, maybe
• American prosecutor to try criminal and address one of those getting off for a short time