Veils, headpieces, shoes are encouraged. Some retailers simply make up traditions in order to sell you a few more things. A coin dealer will sell you a sixpence for ten cents. Caterers can have hidden costs that they don't mention up front, for example, a fee the caterer pays the hall to be listed as a recommended supplier. Or in some cases, managers of hotels were taking kickbacks from disk jockeys and entertainers in order to recommend them to brides and grooms.
Bills can sometimes double.
You end up paying for 'extras' that you would assume are in the photo package. The final rip-off. Bridal gown preservation. Several companies charge extremely high prices, two or three hundred dollars and they don't even clean the dress. One company sent the dress back to the bride in a sealed box that said if the seal was broken it voided the warranty.