You may get a request for your materials to be sent overnight. If so, Do it. It is a rare request these days, but at least prepare for this possibility before your campaign. Get a few copies and all your shipping materials ready before you begin your campaign. More often a two day delivery service is perfectly fine. It is also acceptable to ask how quickly they need the materials. They may have several things "in the hopper," or be headed out on vacation for two weeks, in which case you want to time your package with their return to the office or before they leave.
