You should. I'm one of those types who believes that, if at all possible, you follow protocols all the time - even if they are not required - so that they become a habit.
As an example; you're submitting to Festival X which does not require any paperwork. Someone from Festival Y sees your project at Festival X and asks if you would like to screen it at Festival Y. However, Festival Y requires the detailed paperwork. Now, because you are always following proper protocols, it's not a big deal; you make your copies, put them in with your press kit and the project in the format required and you're all set to go, no frantic running around to fulfill requirements.
The another reason is that you aspire to be a professional. This is one of the numerous things you need to do to be professional. It also gives you a professional image, which is another asset.