Drupal Dev Days is a non-profit event. For this reason, volunteers are essential to the organisation. Volunteers make that everything is going on and works, avoiding the possible problems. Volunteers shores are easy and it is not necessary a preliminary preparation. Some of these tasks are preparing welcomed bags, taking control about talks times or assisting register tables.
Moreover, if you want to be volunteer, it is not necessary that you spend all the day in this task, because you are able to tell the organisation how many hours you want to invest on it.
If you are interested in being volunteer, fill this!