Typically we don't travel, but we do have to each spend one weekend a month on duty with the National Guard. Those weekends are usually just the days and we get to come home in the evenings, but occasionally they do require going out of town and staying the whole weekend (most drills are two days but some are longer). Also, we each have a two-week annual training obligation where we have to be away; so far we haven't had this overlap and one of us is able to be home. We are very lucky and have a great support system with our parents so the au pair will rarely be affected by these obligations.