There is no such thing as an international drivers license. What AAA offers is a translation of your license so that non english reading officials can understand what you are shwing them. It is why you have to bring your US license with you. Most countries have a time limit of around 90 days in which you can legally drive with your foreign license which is why it may be a good idea to keep your passport with you in case you need to prove your time of stay. Sp do you need it? NO. Will it be of any benefit? Possibly
On the plains of hesitation lie the blackened bones of countless millions who at the dawn of victory lay down to rest, and in resting died.
Go forth and be a force of the awesome!